Hydraulic Roller Lifters

JoJo said
Thanks for the feedback.

fstfish66 - Yes, this will be a street/strip type of setup. Already have 4-bbl carb & intake, Mallory distributor, Summit Street/Strip coil, electric fuel pump & fan. Bottom end will be stock with standard bore. Looking to add a set of 340 heads after the rebuild.

360duster - I had that feeling.

340sFastback - So, it's similar to the old & new style 350 blocks with the "spider" to hold down the lifters?

MoparAnglia - What about these cam specs: Lift: .447/.447, Duration: 291/291, Duration @ .050": 223/223, Lobe Separation: 112 LC

I'm just trying to choose a cam that will improve power and performance, but not kill it. This is my first time rebuilding a 318 engine and getting technical with improving performance cam wise.

Okay, keeping the tech relatively basic, the 318 suffers from a lack of static compression from the factory mainly due to the pistons sitting way below the deck surface at TDC. What this means is that dynamic compression (which factors in rod length and cam timing) can become unacceptably low with a long duration cam. You want a cam which closes the intake valve relatively soon after the piston reaches BDC. All else being equal, this means shorter duration on the intake lobes.

I'm sure others could chime in with specific cam recommendations but something like a Comp 270H Magnum grind might be a good choice or a little milder with a High Energy 268. Other brands are available!