I have had 904's since 93 with everything from a 275HP 318 to a 500 HP race 360. A lock up converter is weak. I am so sick of 727 gurus hailing them when they have no practical experience with 904's. I sold my engine and trans to a guy in 2002 and he is still running the trans. Talk to John Cope at CRT. I think the biggest problem is the lockup trans, not being a 904.

Tune in for my next sermon " too big a cam will make a good street motor a dog"