a eddy LD4B would work good for the #302 heads and has small ports and runners for the 318 heads

mine 318 works good with an LD4B on the heavy truck with an edddy 600 carb,voodoo roller cam,stock high stall with 3.23 gear and headers

nice running little 318


the LA engine will bolt right up in place of the poly

the hard part is the throttle pressure rod from the carb to the tranny

the bell crank bracket is diff between the poly and LA engines

should be able to use all the pullys/damper and wp and t-cover from the poly along with the dist

that old poly prob has a forged steel crank that would work in the LA block also

I did it in a 65 ply fury along time ago...just dont remember what I done for the throttle rod to the tranny

I was 16-17 yrs old and prob didnt even hook it up