tci 904 or built 727

The part that explodes is the sintered iron front clutch drum. It explodes because the sprague gets damaged. They get damaged in a lot of ways, but the ones I see have never turned in the case. the steel fingers are simple sheet metal, and the rollers or fingers break or flatten, and then the forward drum loses it's fixed anchor. The sprague can turn in the case, but the bolt in spragues run bolts thru the case to stop the turning. Still doesnt stop the fingers straightening out...lol. So the best way to do it is to get rid of the drum and replace it with a steel unit that holds more frictions, and has the multi-spring piston.

I have a buddy who runs the C4 in his car, I was simply using the metric trans as an example of "good because no-one uses them".

On the governors... using the A&A ones with Cheetas or modified valve bodies may end up with a different rpm than what you bought them for... Just an FYI...