i put a stock windsor from a bronco in my '82.
only had to do a carb conversion, so i chose edelbrock to help me out with that, with a performer rpm II top end kit.
i never installed the heads or the cam, but i used the air gap intake manifold, and i am running pretty hard. with the stock rearend i'm around the low 13 second range... i havent figured out how to not spin the first two gears yet...
if i could launch the car, i imagine i could get a pretty quick time, maybe high 12's.. and with the heads and cam, i should be in the 450hp range at the crank...
this top end kit cost $2200 if i remember correctly... i would highly suggest the 351 because of it's aftermarket following being nearly as strong as the 5.0.. flip through your MM&FF mag and count the parts for the clevlands... i dont think you'll be able to count on both hands!