Street Strip 904

I'd suggest the Trans-go TF-2 kit. It retains all the automatic features but also lets you manual shift at any time. It also addresses the problem of shift overlap that many other shift improver kits don't. Due to that it is a little more costly and is more work to install but it is worth the time and money. It's the only kit I use for a street and strip car. Also if you wan't a little snappier shift along with it you can make a blocker rod for the accumulator. The only disadvantage to doing this is it shifts quite firm at low speeds.

If your running 400-450 hp through it make sure the trans. is in really good condition because it won't live long if it isn't. If your completely going through it make sure and shim all the clearances to spec. and shim the excess clearance in the drivetrain assy. that Ma Mopar left loose from the factory. If you do this you'll have a great working 904 for a long time.

Oh yeah. Like 340S said about a deep pan and cooler are a great addition also.