yeah anything is possible...
I think the best option I have read about is the Ford 4.6.. Its still a pretty compact design vs the bigger V8s
4.6L V-8 SPECS
Engine:
4.6L 16v SOHC, 24v SOHC, 32v DOHC V-8
Production Plants:
• Romeo Engine Plant in Romeo, Michigan
• Windsor Engine Plant in Windsor, Ontario
• Essex Engine Plant in Windsor, Ontario
Displacement:
4.6 liters, 281 cubic inches
Block Material:
Cast iron
Cylinder Head Material:
Aluminum
Firing Order:
1-3-7-2-6-5-4-8
Bore:
3.55 inches
Stroke:
3.55 inches
Deck Height:
8.937 inches
Compression Ratio:
9.4 : 1 (2v)
9.8 : 1 (3v)
Valvetrain:Single overhead camshaft, available in 16 valve (2 valves per cylinder) or 24 valve (3 valves per cylinder). Ford also built a high performance 32 valve, DOHC 4.6L, but it was never offered in the Ford F-150.
Fuel System:
Electronic, sequential multiport fuel injection
Oil Capacity:
6 quarts w/ filter
Horsepower:
220 hp @ 4,750 rpm (F-150 2v, 1997)
292 hp @ 5,700 rpm (F-150 3v, 2010)
Torque:
265 lb-ft @ 4,000 rpm (F-150 2v, 1997)
320 lb-ft @ 4,000 rpm (F-150 3v, 2010)
Applications:
Ford F-150, Ford cars (including Mustang), Ford Expedition
Its in a ton of cars so parts will be cheap as well
Depending on which year you get the Hp is ok to great for the Gen 1 size.
Like was mentioned above ^^^ Most that have added the V8 have been SAS'ed.
Im guessing the weight would require it...