Butler does not offer a off the shelf solid roller version of the 4 Cam, it’s a hydro roller.
If you do not want to take apart the heads to check some things then to be safe you can’t run a Cam of more then .460” lift at the valve, so even the hydro roller version can’t be used with that .460” limit.
I find it crazy to try and justify the cost of a full solid roller set up if your limited to .460” lift!
And the 3.23 rear gears is another limit to me in terms of duration that can be run.
Here’s a kinda old, but very well though out and tested out guide for Caming from HO racing.
I am assuming that this guys 3.23 rear gears are original, and if that’s the case then the original cam would have been the 066 or 067 cam..
If those 48 casting heads are original to the motor then the factory Cam would have been the 068.
If he wants to run a flat tappet Cam then changing out the springs to Crower 68404-16 will open the door to a bunch more Cam choices, and there a drop in for the factory ones!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
Last edited by steve25; 06-13-2021 at 02:07 PM.
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