What is the max cam lift you can use with stock heads / valve springs on the 06' and newer heads?

 

.575" LIFT, will slide under, but piston/valve, valve/valve, must be taken into consideration with certain cams.
Scott

 

Thanks Scott.
I toying with the following cam options:

If a Woods cam: TW 6-6 or TW 555 or TW 7H

If an Andrews can: 31H or 37H or 54H

Planning on porting and polishing the heads and bumping the compression to around 10:1 with pistons.

Is piston-to-valve or valve-to-valve clearance and issue with any of these cams using the stock valve springs?

Appreciate the info.

 

All of those are plug/play under that behive spring.
The 555 will want about 10.4-5 to get the full potential from that new grind from Bob Wood.
That will be available in/around 8/20 as we have been told.
Scott