I personally would waste my time with a 350 if you gave it to me. . . .
305durable dependable but ain't going to have the power ya want. . .
they both are long past there prime never were that great new. . .
get a diesel engine or a late modle EFI engine.
gas 5.3L 6.0L 8.1L or diesel 6.2L, 6.5L, 6.6L
best option spend some money and get a 5.9L or 6.7L like i'm going to do. . .
