New Member Getting Started 66 BB

[Paul O.]

Re: New Member Getting Started 66 BB

Attaching some better photos here of my engine pad & transmission. Pad numbers look right to me but I'm certainly no expert. Had transmission checked over by experience guy (35 years transmission work) and he claims it is an M22. I have other transmission pictures but only room for a few here. Appreciate any additional input to help me verify this engine code and transmission look correct.

IMG_20220514_163008734[1].jpgIMG_6315[1].jpgIMG_6312[1].jpgIMG_6307[1].jpg

[Paul O.]

Re: New Member Getting Started 66 BB

2 more photos of engine pad and transmission stamp to help verify if these appear correct? thanks

IMG_20220514_163030884[1].jpgIMG_6317[1].jpg

[Tim G.]

Re: New Member Getting Started 66 BB

Paul, I have never seen an IK stamp in all the years I've been involved in this hobby. If anyone has a picture of another one, I'd sure welcome seeing it.

[Larry E.]

Re: New Member Getting Started 66 BB

While we are on this interesting subject I decided to get out my old notes and handout programs from my old
seminairs with Al Grenning. I attended 3 to 4 of them on this subject in the early 2000's. The following is just
as I read them from my materials. Can they be wrong? Of course; we all know when we study old records of cars
NOTHING IS 100%. He is what I see.>

There where only 2 L72-M22's made at the Chevrolet Tonawanda Plant in 1966. The only dates they could have
possibly put in a Corvette at St. Louis where> S.O.P.(Start of Production) To 10/65; then they where removed from
production (Engineering Change #73712) to 6/7/66>Reintroduced at this date to E.O.P.(End of Production). Tonawanda
records show NO L88's where made but 20 "Experimental Engines Where". What where they is anybodies guess. The
Code IK was assigned to both L72's and L88's between 1965 and 1966 as with IT for L88's. This is just how I read
the material given to me by Al Greening. (Will not put these records on the board as they where given to us by Al and
is his property.

I am by no means a expert on this subject or engine pads. I know of several other people of this board that know way
more then me but do not know it they will make a comment. Good luck to Paul on finding out what this block is. Larry

[Mark L.]

Re: New Member Getting Started 66 BB

Paul, Since this thread peaked my interest I thought I'd look to see what the dealer code is. I suggest you order a Shipping Data Report as the code is very unusual. It also shows the build date of the car and you can compare it to the engine build date. Good luck.

[Paul O.]

Re: New Member Getting Started 66 BB

Can a Shipping Data Report be ordered without documentation? All I have is original owners manual and no owner history beyond deceased prior owner. I requested title search thru secretary state but their records only go back 15 years which not long enough to pickup any previous history. thanks

[Mark L.]

Re: New Member Getting Started 66 BB

You can do it on the NCRS.Org site. No documentation required.

[Paul O.]

Re: New Member Getting Started 66 BB

just ordered SDR... thanks

[Dan A.]

Re: New Member Getting Started 66 BB

Two requests. Is this car a coupe or a convertible? Photo of the block casting date found on the passenger side just ahead of the starter. It will be upside down.

It will look like this.

194676S109268 eng stamp 5 cast date + V T d t.jpg

[Duke W.]

Re: New Member Getting Started 66 BB

It's my understanding that engines mated to M-22 were equipped with the "small" flywheel and 10.4" clutch, rather than the 14" flywheel and 11" clutch, so a different engine code would be required with M-22 since the flywheel and clutch were installed at Tonawanda.

According to Corvette News, the Penske L-72 delivered in December and destined to race at Daytona and Sebring was equipped with M-22, so it must have had a "small" flywheel and 10.4" clutch.

So if only two '66 models were produced with M-22, the subject vehicle in this thread must be the other one, but the build dates of these two cars don't jibe with the time frames that Al says M-22 was available in.

Duke

[Leif A.]

Re: New Member Getting Started 66 BB

Wasn't the engine VIN pad and transmission partial VIN stamped at the same time with the same gang holder?

[Keith B.]

Re: New Member Getting Started 66 BB

attached in the link is a handout about 65-66 M22 from Al Greening. As stated above I would not change anything in the engine that is not original. there is no reason why it can't be driven is stock form. Also what ever cam shaft you chose make sure the shop cuts the grove in the rear journal and uses the correct rear cam barring

C2 65-66 M22 production - CorvetteForum - Chevrolet Corvette Forum Discussion

[Duke W.]

Re: New Member Getting Started 66 BB

New member getting started on this NCRS site looking for some direction:





Already decided on some internal upgrades to make the car more drivable (i.e. roller cam & hydraulic lifters and lower compression pistons). It's a sweet car that I will continue to enjoy either way. Just trying to decide how far to take this.

Appreciate any direction the experts can give me.

I hope you reconsider. unless compression and leakdown testing indicate that the engine is at end of life.

If you think there is a driveability problem I doubt if it's the camshaft. These SHP big blocks are milder than mechanical lifter small blocks, and they're quite docile and easy to handle in traffic.

A friend recently sold his original 15K miles, 3.70 axle L-71 on BaT. You should look at the driving video. With only 91 PON gasoline in CA we had to reduce initial timing to less than 4 deg., but it you have 93 you should be able to get it up into the optimum range of 6-10 with the as built CR, which is likely a few tenths less than the advertised 11:1. We converted to full time vacuum advance, which made it even more docile.

The Achilles heel of these early big blocks is the valve springs, so if yours are still the early single spring/damper type they should be changed to something equivalent to the second design dual spring that showed up in '69''.

I suggest an idle speed of 900 and it should pull about 14" Hg at that speed.

https://bringatrailer.com/listing/1967-chevrolet-corvette-146/

Duke

[Larry E.]

Re: New Member Getting Started 66 BB

[QUOTE=Duke Williams
According to Corvette News, the Penske L-72 delivered in December and destined to race at Daytona and Sebring was equipped with M-22, so it must have had a "small" flywheel and 10.4" clutch.

So if only two '66 models were produced with M-22, the subject vehicle in this thread must be the other one, but the build dates of these two cars don't jibe with the time frames that Al says M-22 was available in.

Duke[/QUOTE]
Duke>Since we are in a very old "grey" area it could be that Penske's L72 was actually one of the "20 Experimental Engines"
that Chevy designated as a L72 at that time but who really knows for sure. Larry

[Tom D.]

Re: New Member Getting Started 66 BB

Would the right bell housing be a "444" or other number?