new engine, 4400rpm at 80mph 36 inch tires (stock)
new engine, 4100rpm " " 38.5inch tires
new engine, overdrive tranny 3200rpm at 80mph 36 inch tires
" " 3000rpm at 80mph 38.5" tires
it costs as much as you are willing to spend, beg, trade and fabricate. to pay someone? who knows.
if you could get a free motor and tranny and can weld i guess a few hundred though