Just got back from the war,, back to work teaching auto tech.
Will a supercharger from a buick V6 fit on a 4.3 V6? I'm brainstorming...

That will depend on the lower intake.

Welcome! And Welcome back. Glad you found your way back safely. Thank you for what you are doing for all of us.
Salute!

Welcome to the Forum!! Thank you for your service and glad ya made it home safe!

Welcome to the GMForum and thank you for your service!

Welcome to GMForum! I've always wondered the same thing so hopefully someone knowledgeable will happen along soon and let us know.

As far as I know and have read, no. They can be adapted to a 4.1. but a 4.3 is basically a 350 with 2 cylinders chopped and the manifold differences great. Lets add to that the 4.3 has a distributor, and no way to accomadate that. About the only way to achieve this is to build a custom intake plenum. Welcome to the GMForum and as mentioned, Thank You for your Service and glad to hear you made it back A-OK.

Anything can be made to fit with a mill and some effort, and don't forget money. As John mentioned, there may be some things in the way. But, you should be able to take a intake and make a custom plate to mount between that and the supercharger. You will have to make sure the outlet is in the right place, and the pulley lines up with your belt travel. Then it'* a mater of tuning.

Welcome to forum thank you for youre service and ive wonderd the same as i have one i was thinking of idears on adapting it to my red truck(4.3) welcome thanks again for youur service and glad you made it home safe

Your forgetting the distributor Dan. Really makes a mess of things. The 350 will bolt to the 4.3 bellhousing, so why the expense and fabrication for an engine ill engineered and IMO gutless. Seen many easy V8 conversions from 4.3.