64 Underhood Details - attention Alan Drake

[Larry M.]

Alan - I'd appreciate your responding to this as you have a very original/correct 64 car. I'd also appreciate any other responses. I could search the archive but I don't think I'll easily get to this level of detail, and I don't think this is much work for you. In fact, you can likely answer this off the top. Really three areas and I'd like you tell me what is not right.

First - plastic wiring straps - and I've tried to follow the AIM so I think this is correct. Just tell me what is wrong.

Foldover push plug type - three on left inner fender; three on right inner fender, one of these in front of hood support which I had to add. I only have this one around the radiator expansion hose as it is called out on the rediator page of the AIM and I can't get around both the hose and the wiring harness. Then one on battery box. A total of seven.

White/translucent T type on fire wall working left to right - five straps - no black T straps
1. Washer Hose(WH) to hood latch cable (HLC)
2. WH to HLC
3. Wiring Harness(WH2) to HLC
4. WH2 plus looped coil wiring to HLC
5. WH2 to HLC

Second - metal clips for wire or cable retention. Five across top of firewall under body lip. All five of mine are attached with philips screws and I can see no evidence of bonding as the AIM calls for - could this be correct? Again working left to right
1. AIM says 3799990. Mine is flat strap bent to clip shape and plasti coated. This one mounted upside down so to speak and holds wiring harness only
2. AIM calls this out on hood latch page with spacing but no part number. Flat strap with curled edge bent to clip shape and no plastic. Painted black but I think this is from a firewall painting. Holds HLC only.
3. Same as 2 mounted dead center, no paint and also upside down. Holds HLC only.
4. Same as 2
5. Same as 1 but not upside down.
Then additional:
6. Under pal nut on lower edge of heater box cover and holds wiring harness drop to starter. Didn't look up part number but may be different than 1 above - possibly larger, but also flat and coated.
7. Really in transmission tunnel holding speedo cable and back up light switch harness. Similar to #2 I thnk. Again I didn't Jack up car to get a good look or how mounted. Would have to be rivet or bonded I think.
8. On firewall ledge below clutch rod boot to hold engine harness coming off bulkhead connector, coated and attached with screw.

Third - nuts to attach blowermotor/heater box cover to firewall (probably studs off heater box inside). Paragon sells a set of forged flange nuts for this but I suspect this is wrong. Corvette central sells pal nuts, 4 large flange for flat section and 3 small flange for arount blower motor section. Is the large and small flange pal nut solution right? What I have on the car is pal but I'm missing one of the small ones which got me looking at this. Richard Fortier sells the small one, his part 3738 in his Driveline ad, with scalloped or waffled edges and he says that's correct. What do you think?

Again, thanks in advance for your help.

[Alan D.]

Re: 64 Underhood Details - attention Alan Drake

Will need to get to these in small sections; So, the Right Side (passanger) fender retainers. I too have wondered about this area and know my stuff has been moved at some time.


Total of three is correct, see UPC 11-13sA4.00 I have my hose only going through the first, ie at over flow tank. It's also at the first position so you get the biggest closure as possible. From the various period pictures (inc Noland) it did appear that was the standard practice.
I have a lot of ware under the fender lip at the expansion tank leading me to believe the wire harness had always been in that location and therefore never in the first fender retainer, additionally trying to put the wire harness into the fender retainer made it a little short when trying to attach to the alternator.

The center fender retainer only has the wire harness in it, the hose is up under the fender lip. And the last fender lip again only has the wire harness. YES, it appears that the hose & harness should be in both (UPC12 sA8.00) Problem I have is that the overflow hose is original and any attempt to also put it into the other two fender retainers would require a hose stretcher. Has that hose been shorten for insulation of a new radiator/expansion tank over the years - possibility

[Alan D.]

Re: 64 Underhood Details - attention Alan Drake

Left (drivers) Side fender retainers, UPC 12sA11.00 Hold all the wire harness (may be two if TI) These are all on the second position so you get the smallest closure as possible. These have not be modified or otherwise, so feel confident on this side. Note all these including the battery box are BLACK.


Note that UPC will locate the "bonding" clip 3799990 that is under the lip, that's bonded not a rivet as later years used think that's your #8.

The "metal clips for wire or cable retention. Five across top of firewall under body lip. All five of mine are attached with philips screws and I can see no evidence of bonding as the AIM calls for - could this be correct?" Mine also are held by phillips also.

I'll get back to this tomorrow, car is in trailer and it's a little dark right now.

[Larry M.]

Re: 64 Underhood Details - attention Alan Drake

I did a little more research and found more - doesn't really change anything but I'll update.

First Section - no change but since you've already responded in part, on my right inner fender both the hose and harness are through positions 1 and 2 as you call them. Of course I only have the light harness on the left and it goes through all three.

Second section - of the five clips across I did see the part number on the next page of the AIM and 2,3 & 4 are a different number than 1 and 5. They are 3706345. #6 does show under the pal nut and is the same number as 1 and 5 as. #8 is also this number. #7 is a third number and is riveted per the AIM. As I said, I didn't jack up to look at it but when I do, if it is still riveted, I'll just assume it is correct.

Third section - There are two different numbers for the pal nuts. The small one is 9419844 and the large is 9419846 for my Nov car. Due to revision 1/30/64 the large one for your car would be 446069 (huge difference in number; makes me wonder how it is different). Since both numbers are similar for mine I think they are both pal but I'm wondering if yours, especially the small ones, are waffled.

[Alan D.]

Re: 64 Underhood Details - attention Alan Drake

A picture of the tunnel clip used to hold the speedo cable & do not forget about the White strap that holds the over flow tube at the rear bumper support.

[Larry M.]

Re: 64 Underhood Details - attention Alan Drake

Alan, two things, thanks for the note on the over flow....I'm missing that strap. Second, there is another 3799990 ( call it #9) which is on the light harness before it reaches the inner fender on the left. I checked after seeing it in the AIM and I have it - bonded. There is not enough material there for a screw. Also there are three of this same clip on the rear taillight harness per the AIM which expands the scope of this email.....I felt around and have the left one...can't get my hand into the others without taking out the spare tire tub...but I'll keep it in the back of my mind.

[Larry M.]

Re: 64 Underhood Details - attention Alan Drake

Further Update: I keep looking. I described #9(section two) above. There is a #10 just like it on the right side. Additionally, if you have back up lights, there is a #11 riveted to the firewall for the back up light switch. I have it and it is riveted - had realy never looked at it before. And you could call the three acorss the back as #12-14.

And responding to your comments, my engine harness on the right is not totally hidden under the fender lip. It makes a radius across the corner over the right hood latch. If it did not I would not be able to reach my alternator either. It is out there far enough to cause a concern with catching the latch pin on the hood.

I would appreciate your total response. Thanks.

[Alan D.]

Re: 64 Underhood Details - attention Alan Drake

Larry,
I would accept what the AIM is showing however sometimes it will miss. As we saw some of the clips are held by screws where the AIM calls for adhesive & just to really wonder off the subject the FI air cleaner "S" tube sometimes is secured by "high hat" screws that are not listed anywhere in the AIM. So the additional clips you are finding in the AIM are also on my car.

I had some computer problems over the weekend so respond is a little slow. Think my best response on the "engine harness on the right is not totally hidden under the fender lip" is to take a picture later today after work.

[Alan D.]

Re: 64 Underhood Details - attention Alan Drake

Pictures sent! Expect you may need to enlarge them so sent in email to give you HD stuff.