Join Date: Dec 2008
Location: Tyler, TX
Thanked 407 Times in 347 Posts
I would NOT use a 6.5L, compared to the "B" cummins, they are junk.
The later 700R4s are decent transmissions, and often used in panel trucks, so you may be able to find a complete engine/trans combo. I would shy away from the early R4s as their durability is poor at best - unless reworked to later standards.
The "4B" in a Jeep should return excellant fuel economy and great pulling power, that would be a great swap I think.
'93 F-250 HD, 7.3L IDI, 5spd - FARM TRUCK
I Support: Trailer brakes an every axle over the towing vehicle's GVW; CDLs for RVers; Safety inspections for ALL vehicles and 6 axle trucks (97K GVW proposal).
Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote - Benjamin Franklin
I vote for LIBERTY!