Quote:
Originally Posted by Bob B.
Cummins 4B3.9: These are small enough not to require cutting the firewall, but they are tall and the front crossmember might be an issue. GM used these engines in Step-Vans a few years, and there is an adapter to mate a 4B3.9 to a Turbo 400. Good luck finding one. The engine is very reliable, but doesn't make a lot of power, is very noisy and vibrates A LOT. Stock gearing could be a problem, these redline at about 2,300 r.p.m. in many applications.
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Doesn't make alot of power??? You don't think 300 ft. lbs of torque for a 239 cu. in 4 cylinder is alot of oomph?
