[Ryan1969Chevelle]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RamblerDealer</div><div class="ubbcode-body">Ryan, just reading to catch up on your progress. A couple of things, when I'm at the cottage next week I will go get that rocket 350 for
you, it may have the carb you are looking for. It does have the cool valve covers with Oldsmobile stamped into them. Just a question, why
would any one ever use a heat riser for anything? They warp intakes and carbs, fill the ports with crap, overheat and split the porcelains
in the spark plugs, cause restriction that is hard on fuel distribution and balance inside the intake, and just cost horse power. You will never drive the car when it is cold out, and it probably would not make any difference if you did. Spend the effort on the ID of the
manifolds were they exit to the down pipes and the id of the pipe flange were it all bolts together. If you wanted I could get my friend
Kenny Parkman to put your heads on the flow bench with the exhaust manifolds. That may help in camshaft selection, My guess is there is a
big imbalance with the manifolds bolted on and the exhaust specs may be critical in this type of restrictor motor. </div></div>

Terry, you are a Canadian GEM!!!!

A few people off to the side have shared the same opinion on the heat riser. I was concerned that on cool mornings the choke would stay active and run rich for too long. (remember I am a rookie with many years of experience reading car magazines only) Casey Marks also says he blocked his cross over and tossed the heat riser. Final decision, no heat riser. (I will let Dan J. know as he rebuilds the carb so if any items can be adjusted to compensate a little he can do them as apart of the carb rebuild)

I had two Olds engine builders both recommend the same cam shaft:-) and it does have a dual pattern with additional lift and duration on the exhaust side to help with the restricted exit path. I will make one set of PSMCDR manifolds with no modifications and one set bored out at the exit to match a little better the 2.5 inch exhaust system.

I would love a price to flow test the heads with and without the manifolds.

I think you mentioned a 350 sitting out in cottage country:-) Bring it:-)

Ryan