Rpm 340 Cyl heads on a 318 !

202 valves like careful cam selection, gears, 340 type converter or to go with cam and the rest of the package
really easy to overcam SBM especially 273- 318
not something I would do with stock converter and 2.74-3.31 gears
which trans 904-727 or stick?
sorry about the RPM
they are usually bigger than the cc's claimed-
are these new? get them checked out for guide tight and valve/ seat concentricity, check the springs,
anyone with recent RPM experience speak up
if you have a choice the ones without the .060 cut are easier to work with
if you do have to use the fly cut ones figure on a couple of extra trial assemblies with pop up pistons
if these rpm's are swap meet check for flat and surface finish cc anyway