Tecdiverfl

I have a 1970 numbers matching that origally came with a 300 hp 350. During the restoration a 350/350 hp cam was used. Everthing else in original 300 hp. What other difference were there on the 350 hp cars?
My carb was jetted with the orignal 300 hp specs and was also wondering if the 350 hp had different jets.

Thanks in advance

Marty

NHRalph

Not sure but I believe the only difference in the actual engine was cam and compression ratio. Blocks and heads had same casting numbers in 1970, block was3970010 and the heads on both were 3927186 and 3927187 was also used on the 350, the LT1 engine used heads 3973414. Valves may of been different also.

Oldguard 7

350/350 used domed pistons also.

Barry's70LT1

350/300
Heads = 1.94" intake valves. (Not sure on the exhaust) 64cc
Pistons = Flat top cast aluminum, 10.25:1 Compression
Connecting rods = standard
Crankshaft = Cast steel
Camshaft = low performance, good idle

350/350
Heads = 2.02" intakes, 1.6" exhaust 64cc
Pistons = Dome top, forged aluminum, 11.0:1 Compression
Connecting rods = Forged, Shot Peened, Magafluxed (Pink)
Crankshaft = Forged Steel
Camshaft = Hi Performance, somewhat lumpy idle.(3896962)

Smokin Joe

yup this is true.