318 bored.030 over.
RPM Air Gap manifold
Edelbrock heads (63cc combustion chamber)
Static compression ratio will be right around 9.5:1
1 5/8 headers.

I'm looking at the following Hydraulic rollers:
XR268 (218/224 @.050)
XR274 (224/230 @.050)
XR280 (230/260 @.050)

I still need enough vacuum for power brakes. Research shows me that anything around 230 duration on the intake will start to hurt engine vacuum. Is the 280 grind too much? Also, I plan on running a small 75-100 shot of nitrous.

 

How much converter and rear gear do you have, what is the vehicle?

 

Dodge D150, weight will be somewhere around 3800-4000.
Rear gear hasnt been decided yet, waiting until I decide on the cam. I was thinking somewhere between 3.70-3.90. I really dont want to go into the 4's with the gear.
Same with the converter, waiting on cam choice before I buy.

 

Similar build on my 318, the 268 cam going in. Love the specs on that thing. Mild enough to not lope badly or affect vacuum, but comes with enough thump to for sure know it's there.