hbps1978 wrote:I have a standard production "010" casting 4 bolt main journal small block 350 chevy block out of a 1972 corvette, was originally an L-82 engine block. I bought a set of Crower #66290H .903" diameter roller lifters and I also have a set of Crower #66374 .875: diameter solid roller lifters. Can I have my lifter bores enlarged for either set of lifters without installing bushings in the lifter bores? Do I need to run bushings with either set of these lifter? I'm building a bracket race engine and have never ran the larger diameter lifters. Thanks to all ahead of time
wyrmrider wrote:agree with carl
by fitting check the oil supply, you do not want to uncover the lifter oil gallery where bushings allow you to oil in the most appropriate place
Crower also makes a .927 with an .850 wheel
BVVC if small base circle
have you asked Crower?
bottom line bushing is not necessary unless oil passage is uncovered
whose cam? (grinder needs to know)
Bucky wrote:The only problem I almost had with a standard cam is the room between the lobes. That is pretty darn tight with the .903's. I make it, but not by much. The cam has be be in there just right and not move much.
1fast10 wrote:I have a similar question.I have shp SBC block with standard lifter bores been thinking of upgrading to .903 is it worth it and what's the general cost.will be a 421 inch motor.spin 7800-8200 and we are running a .950 core cam .using callies xd rods