Recommendations for Cam?

Lowend

Administrator. .a car, a man, a maraca.
Staff member
Lifetime Gold Member
Mar 25, 1999
16,895
San Jose, CA, USA
There are, but a roller cam swap also requires Valve Springs, Pushrods and a few other items. You'll have $1500 into it all said and done.
The Isky 260265/272 is a great Hyd Roller kit with pretty much everything you need for the swap.
  • 0.050 Duration Int/Ext. 217/225
  • Lobe Center 112
  • Valve Lift Int/Ext. 0.485/0.505
Note that with 1.6 Rockers this is going to be close to what factory heads can support.
 

sandlapper

Veteran Member
Oct 9, 2020
1,757
SE CSA

2 bbl carb so likely rpo L65 --- although rated at 8.5:1 CR, in all likelihood it may not even make true 8:1.
So, as with many Low-compression motors, it'll be all too easy to fall into the Over-cam trap. Don't!

Here, when considering a roller cam-lifters Retro-fit (given its relatively high cost), I'll again suggest OP source a rebuildable core L31 Vortec roller cam motor with its Very good heads and OE roller lifters and respectable 9.4:1 CR. Those lifters may be reusable; but if not, New replacements are stupid cheap (compared to Retro-lifters). And Summit has a selection of 4 USA step-nose steel roller cams at under $270 each. A fellow who's both clever and handy could easily have 350-400 reliable roller horsepower for small money --- with No flat tappet break-in / maintenance issues.
 

G72Zed

Veteran Member
Sep 8, 2015
4,405
Canada
With only 8.5 CR back in 1974, I would stay real close to the 210* @ .050 range. Nothing worse than stock low perf heads and a late closing intake valve with low SCR, grandma in the Venza in the next lane is going to kick your a$$.

Better the head, the more you can spread the LSA.
 

Lowend

Administrator. .a car, a man, a maraca.
Staff member
Lifetime Gold Member
Mar 25, 1999
16,895
San Jose, CA, USA
@sandlapper is correct on the newer engine thing. Better heads and more compression with factory provisions for the roller cam is a winner all around.
No offense intended, but those 70's smog-era engines are boat anchors as a whole.
 




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