340 head clearance?

Don't assume that you will have enough valve to piston clearance!
That piston # looks vary familiar and i think it is the same piston i have in my 340.
I did NOT have enough Valve to Piston Clearance do to a ski jump at the end of the valve releaf were it meets the flat top of the piston.
Removed the bump and had tons of clearance. and that was with a MP .474/280 Hyd cam.