About four years ago I put in a Crane 343901 in a 390 I was building. This was the result of sifting through a lot of FTE threads - thanks guys! The engine was a great runner - had a solid bottom end and pulled hard all the way up. When the truck was empty, acceleration was impressive, and when towing, it did very well even with a GCVW over 10,000 pounds.

There is already some good advice in this thread, but no matter what cam you go with, look at manufacturer guidelines on matching the cam to the engine's compression ratio. Other things are important, but the compression ratio is one you are not going to easily change after the engine is together. My engine was above 9.5:1 and it liked the cam. It would run fine on mid-grade gas, but I ran premium when doing heavy hauling just for a little more margin of safety. If you are shooting for a lower compression ratio for running regular gas, then you will want a little milder cam.

Alvin,

I also would like to be educated on cam timing. Following FTE advice, I put my 343901 in with 4-degrees of advance and was always glad I did, but understanding this is one "blind spot" in my knowledge base. Anybody have a clear explanation?