Any one know if a sm420 or sm465 will mate to a buick 3.8l v-6. Or should I just call advance adapters??

I run a 420 to a 3.8. I used a car bellhousing and had to drill out two of the holes to bolt it to the 420 because they have 2 of the bolts reversed but it worked fine. If you get the 1/2 style cast steel bellhousing they work even better.

Im running a stock jeep 225 bellhousing to my 420. Same deal, drill 2 holes then run a stock (at least in terms of application) buick clutch.

sweet. I guess I was more concerned about which pressure plate and clutch disk to use that would mate to the sm420 input shaft. thanks

Nice thing is since the 420's GM and so is the buick.... clutch is nice and easy...