'67 corvette coupe

[Bruce A.]

Guy's, I've installed a big block radiator with my small block. The trouble I'm having is finding a lower water hose for the bottom that fits without cutting it and installing an adapter coupling.
Does anyone have a part number of a "correct" hose for the bottom connection?

[Bill L.]

Re: '67 corvette coupe

Hi Bruce:

I am not sure of the exact part numbers (Joe Lucia {no relation} will have them) but if you take a look at the photo you will see what your challenge is:

This photo is of the hose for a 327 block and radiator (assumed) part number --- GM #3887155

Screen Shot 2015-08-23 at 9.46.50 PM.png

This photo is of the hose for the 427 blocks and is (assumed) part number --- GM#3882826

Screen Shot 2015-08-23 at 9.47.23 PM.jpg

I don't see either one working really because you have mixed metaphors with a 327 block and water pump running out to a big block radiator...

You may get the pump side attached OK but the problem (per the photos) will clearly be at the lower radiator attachment point. The length difference is also an issue.

Not sure why you have that mix (327 motor and BB radiator???) --- is it possible to revert to a small block radiator? Were you having overheating problems?

My small block 67 coupe 327/300 HP all stock with an original radiator runs pretty cool even here in the Atlanta summer....(90+ degrees and 90+ humidity !!!!) Same for my 66 390 HP big block ----

Hope this helps a bit ---

Regards
Bill

[Bruce A.]

Re: '67 corvette coupe

Thanks Bill.
I added air conditioning with the plan of going on a cross-country trip next summer. I didn't want to take any overheating chances.

[Ray G.]

Re: '67 corvette coupe

Bruce;
If is any help remember the lower radiator hose has the least amount stress and the upper hose has the most.
Coolant temp. is at the lowest point exiting the radiator into the lower hose.
Hope this helps.
Ray

[Michael H.]

Re: '67 corvette coupe

Bruce,

Unless you already have the big block radiator I would call Tom Dewitt and ask him for his recommendation on your application. My guess would be that a new correct small block Dewitt radiator will handle that A/C with no problem, I'm sure there are other members that run the original set up with no problems. I run a 327/350 with a Dewitt radiator and I've never had a over heating problem with 90-95 heat. Another thing is make sure you are running a good clutch fan, not sure but do you run a 7 bladed fan ?

Mike

[Bruce A.]

Re: '67 corvette coupe

Thanks Mike

[Joe R.]

Re: '67 corvette coupe

Thanks Bill.
I added air conditioning with the plan of going on a cross-country trip next summer. I didn't want to take any overheating chances.

Bruce,

I would suggest that your engine will run too cool with this combination. You want the oil to get hot enough to burn off any moisture. Running too cool is not good for your engine. I am fairly certain that GM did a good job engineering the small block with A/C combo. I think you will be happier with a small block radiator.

Joe

[Patrick B.]

Re: '67 corvette coupe

Bruce --- I don't think you have to worry that your engine will be too cool. Just choose an appropriate thermostat. 70-72 LT-1s and A/C 350s used copper radiators not unlike the earlier BB units. It might be worth looking at those hoses. However, if they won't work, joining one end of a 327 hose to the other end of a 427 hose with an adapter and hose clamps should be a workable solution. A flex hose may also work, and I have seen those with different diameters at each end also if needed.

It all depends on weather you already bought a 427 radiator. If so, make it work. If not, a new aluminum SB radiator should be fine, as others have commented.