I assumed cleaned up, ported 452 heads.
The 408 builds I have looked into would likely require aftermarket heads (meaning $$$$) due to the crack issue with stock Magnum heads and the fact that you'd have to get the Magnum heads machined for LA-style intakes anyway.
Have you priced out rebuilding and porting stock iron heads , nevermind choosing the worst design possible ...
an OPEN CHAMBER stock iron head ... it would be cheaper to buy a set of E brock heads than to redo iron heads.
Build a smallblock stroker or do a 5.7 hemi build ... headers in a big block A body are not a joy , figure a Hyd clutch so it's easier to deal with for header clearance , especially big block .
