340 Piston to valve clearance w/RHS heads

goldduster318 said
Yep...I do have a rev limiter. My build would have zero reason to go above 6500 ever, but I'm not sure I wanted to go that high, so I was planning for a 6000 limit.

With that being said, If its too bad, I think the custom head gasket route is preferable to milling the pistons.

I have some J heads, I have no intentions of using them. The cost to rebuild them and get them near the flow of the RHS heads from Brian and have the same springs would meet/exceed the cost (and if I home ported them, this engine would be finished in 2035).

Planning on running the Comp XE274HR hydraulic roller cam, Air Gap, & Edelbrock AVS 800.

i don't get the logic, you want high flowing heads yet aren't going to spin it past 6,000? A basic rebuild J heads with 2.02 intakes could flow past 6,500 rpm's. If your not going to spin it, you won't get the benefits of high flowing heads. Why the 273/318's came with small port heads, they flow BETTER at low flow demands. If the air moves too slow the fuel is going to drop out of the airstream and power goes down

Now the Chevy boy's do run .030 quench, so maybe it be fine but too close for my comfy leve

l. The old Mopar bible claim .060 was min.

Forged pistons are looser in the bore when the motor is cool and will rock more than hyper pistons. When the pistons rock the clearance goes down. Why the bible went for .060 clearance