Racecarl--
I haven't reviewed any numbers on these engines but I would suspect that the 248 would be the strongest candidate. I've had a 248, 2-235s and a 250. 250 had the best high rpm capability and speed but most torque was easily the 248 of all the engines. Don't have any idea if it will fit your engine compartment without alteration. Just my recollection-, others may know more.
