seeking cam advice . 69 cutlass 455 4spd 373 axle . p.s p.b a/c . 455 060 over small valve c heads . performer intake . headers .hei ignition running stock valve train. how big of a cam can i use and if i switch to adjustable rocker arms would it expand my choices pistons are silvolite 1630 all help appreciated .

 

@cutlassefi is the go-to source for camshaft info (among other things) on here. I could give you an opinion but his would be the last word, so let's see if he chimes in.

 

Anyone familiar with that Silvolite piston? Compression ratio?

 

Here's what I found in a web search:

https://uempistons.com/i-17647-singl...8-1968-76.html

Silvolite Piston - 7.5L GM (V8) 1968-76
ALLOY: 332
3.031" dia. head recess .320" deep.
Comp. Ht. IN: 1.720
COMPRESSION RATIO: 8.4


The dish volume calculates to 37.8 cc but the piston is a bit shorter than factory spec.

 

https://uempistons.com/i-17646-singl...8-1968-76.html

1630ALLOY:332BORE INCH:4.125BORE MM:104.8COMP. HT. IN:1.720COMPRESSION RATIO:8.4CROWN CC:+37.5ccCROWN TYPE:DISHCYLINDERS:V8ENG. DISP LITERS:7.5ENG. DISP. IN.:455ENGINE FAMILY:Oldsmobile V-8INTERCHANGE:FM 344PMFG:OldsmobileO.E. ASSEMBLY:400571, 231110OVERSIZES:STD .020 .030 .040 .060PIN CONFIG.:OffsetPIN DIA IN:.980PIN DIA MM:24.9RING SIZES:2-5/64, 1-3/16TOP LAND:.245