Ditch the manifolds,ld340 first off
Then depends how deep your pockets are and you are gonna need more gear like 3:91 or 4:10 and they cruise fine my low low 11 sec car cruises fine 70mph at 2700 rpms
So if pockets are deep get eddy heads, get them stage 2 ported and run a hyd flat tappet cam , the voodoo cams are good I went 11s with a Hughes big grind but don't run heir lifters they are garbage. Run any aluminum intake port match it . You need a good header also the only way to make power is more air in and more exhaust out
If money is tight get cam,springs from same as above and run a 4:10 gear
Good luck
And the real only way to know what cam is to flow headstand intake mani and get cam ground to those flow numbers then get a real converoter for the set up that's the proper way IMO
