Originally Posted by
T-BirdJunkie
Try 13/62 to start, keep a close eye on temps. ThunderbirdJunkie is eager to hear how this motor works in your truck.
What about 48p gearings? I think it would run better.
I'd try a 15-93 or a 16-93 in 48p. Probably lower, but should do well.
All that is, basing in the fact that my 1410 runs absolutely cool at 18/93. maybe I'll rise it to 20/93.