some cam help????
after a bunch of bad luck trying modern cams with original equipment heads and exhaust, I swore i would never try an aftermarket cam in a restoration but here I am again - considering options.
basically, i'm building a 70 LT1 clone - with some hot rod stuff.
1) the engine will be a .030 over 350 with a good forged rotating assembly - I'll be using either KB or DSS racing flat top single relief pistons, a shim gasket, and the new trickflow dhc-175 heads that look like LT1 heads - (60ccs) compression should be right at 11:1 with a .040 quench - i might clean the block .005 but I don't want to remove the numbers on the original 350 block in the car.
stock LT1 intake, wide ratio muncie, and 3.70 gears.
I'm adding factory AC to the car, which shouoldn't be an issue - i've run the L72/LS6 cam in an AC equipped big block without issue so...
2) exhaust will be the 64-65 ramshorn manifolds that have the 2.5" outlet, and will be running a true 2.5 dual system through Gardner N11 offroad mufflers.
For me the obvious GM cam choices are the 30-30 or the original LT1 cam. I've run both, and know just how they perform, and should be just fine in this car.... but i hate to leave free power on the table if it will work with these heads and exhaust.
I've yet to have good luck with a modern cam and cast exhaust - but i know the FAST guys are going crazy fast with exhaust manifolds and roller cams.. so.
I don't want to loose the street friendly character of the GM SHP cams though... so I'm looking at one of the old school Ultradyne Cams - ideally, Harolds old 294s replacement - which is a single pattern 282 adv (at .020) 248 at .050, and .503 lift - but with the manifolds, I'd probably get it on a 112 or 114.
Does anyone thing i'll gain anything by doing this? or should i stick with the 30-30 or the LT1 cam?
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