what upgrades can i get or do for the 95 lumina 3.1l motor?

any intake upgrades or anything really...

can i swap a 3800 into the car bolt in or is there alot of changes that need to be done?

I know mr2 cars like changing the intake from a largport to a small port block increases power but i have NO clue on the lumina

 

Bigger headers, larger exhaust, K&N intake, etc - if it's pre-OBDII, you can't really gain that much more HP... if it's OBD II, you can get a Computer chip mod that will mess with timing, etc...

3.8 would be a tough swap... you might be able to get a 3.4 swapped in there though, not sure what that gets you HP wise, but even so.