This cam really doesn't get real busy until 2500+rpm. (reguardless of the advertized power range)
Althou this cam is advertized to work with a stock converter,
A high stall converter up to 3000 rpm will make a big, big difference. especially if your "stock converter" is only 1700 or less stall. Some stock converters are as low as 1300 stall.
You could use a lot more rear gear expecially with typical 4x4 tires.
3.42 is not enough gear for a a heavy truck and 32"+ tires.
Think 4.56:1 if you have tall tires.
that being said there still may be an internal engine issue.
Start with a compression test.
Possible fuel flow issue.
Last edited by F-BIRD'88; 07-06-2009 at 01:37 PM.