Time for some rain on this parade The Poly heads, all versions that Mopar made, where a compromise to save money over making the hemi heads and valve train parts When Mopar smarten up and introduce the conventional wedge heads on the 273 in 1964 and later on all the other SB those motors started to make decent power and started getting decent mileage OP, its your choice, flog that old dead technoligy piece or step up to a newer, better choice
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
The Poly heads, all versions that Mopar made, where a compromise to save money over making the hemi heads and valve train parts 
When Mopar smarten up and introduce the conventional wedge heads on the 273 in 1964 and later on all the other SB those motors started to make decent power and started getting decent mileage 
OP, its your choice, flog that old dead technoligy piece or step up to a newer, better choice 