upper plenum swaps on comparable ci engines?
 

jus proddin around under the hood of my crown vic an was wondering exactly what 302 upper plenums would work on a 94 5.0? i've seen the cobra, the explorer(which is pretty much the same)victor Jr, performer an others but was wondering about the regular 302 produced in the late 80's crown vics an GM's? could you port these an see any kind of impressive numbers other than a stock O.E 5.0HO upper? has anybody tried them or know the dimensions of the runners? i'm considering a slow rebuild of the plant, an right now goin with an a.m. upper, GT-40's, 65TB,maf an cold air.Jus tryin to get some breathin room?

i have a stock 87 upper ho and a stock 87 upper which was extrude honed. the cast dates are within 3 months of each other and the part #s are identical. there are minor exterior differences, (other than no ho on neck) but i have been told that before it was ported the non ho unit had a smaller diameter front port. i dont know what junk yard vehicle it was taken from, but it is clean.