If you are not going to take a grinder to the stock chevy heads then you will be better off with an aftermarket head ..
although the 454 head you have could also be bowl ported for some extra power. and then milled. then slap on a .015" steel shim gasket if piston deck height allows it
I have a ford van with a 302 keith black flattops, portedand milled heads and intake big single exhaust. stock cam advanced 4 degrees..14.5mpg
then in went a 260h comp cam the engine made more power through the whole power range and picked up 2mpg..it is still pretty low compression...shift point is 4200 with the weazie 2v carb and 355 gears
every time i ran a cam ground on a 112 LS i lost lowend power and only gained a little on the topend....of course those were really old dual pattern grinds 204-214 at .050
hope your cam works out for you...I actually wish i had tried the XE252.
but i think some day the old ford van will be sporting chevy mill
although the 454 head you have could also be bowl ported for some extra power. and then milled. then slap on a .015" steel shim gasket if piston deck height allows it
I have a ford van with a 302 keith black flattops, portedand milled heads and intake big single exhaust. stock cam advanced 4 degrees..14.5mpg
then in went a 260h comp cam the engine made more power through the whole power range and picked up 2mpg..it is still pretty low compression...shift point is 4200 with the weazie 2v carb and 355 gears
every time i ran a cam ground on a 112 LS i lost lowend power and only gained a little on the topend....of course those were really old dual pattern grinds 204-214 at .050
hope your cam works out for you...I actually wish i had tried the XE252.
but i think some day the old ford van will be sporting chevy mill
