Yes, it is all custom work. No fancy $2000 bolt on kits won't do it either. Its RE-ENGINEERING the rear end.

And I don't think there are any engine mods besides a custom turbo. But I wouldn't even do that. You'd drop your trans first time you romped on it.

theres the 3500/6spd from the g6 that would work too but by the time you buy the harness pcm hptuners etc... its very expensive. not as expensive as changing to rwd but probably close and really not all that powerful for the money. sell it and buy a third gen firebird or camaro empty shell or 4/6 cyl they are super cheap. then you can buy lt1/t56 for maybe 2k total or ls1/t56 for 3-4k

I would sell it but right now its my only transportation to work, so that isnt a option for me.
unfortunately

of course unless someone offers me 2k for it then i would be very happy to walk to work haha

I'll give you 2000 pennies for it.

Your working up to a 3800 anyways. Take Mike'* advice and get yourslef a 96 or newer 3800 powered car and then go crazy with upgrades. For the amount it sounds like you want to put into that '91 you should be able to buy a workable 3800.

I recommend any 3800 powered body style 1997 or newer. Should you decide to invest in a programmer, HPTuners can only work with 1997 and newer PCM'*. And if you can, find something that is already supercharged.

My bad on the fat finger. I meant 97. Thank you for clearing that up Mike.
As far as the internal workings if the motor, what'* different between a stock SC and non-SC motor. Obviously a SC and the PCM tuning, anything else??

Series 2 blocks are identical between the L36 and L67
Internally between the 2, the difference is the pistons and connecting rods.
Externally, cylinder heads, throttle body, injectors, fuel rail, intake, lower intake manifold, serpentine belt pulleys etc.

I had to look it up, but the camshaft and crankshaft both have the same part numbers. Even the exhaust/intake valves are the same.
PCM'* can be the same, but just a couple settings in the software need to be changed. Harness is different a little bit, but you can get away with using the existing harness and add 1 wire to the PCM for the boost control valve.

I'm sure there are a couple other little differences, but I think I got the main ones.

Im not really looking to get another car as i like this one and its good and realiable, so i cant afford to buy something else with someone'* problems haha,
but i have been reading that some people can use custom headers made for a 3800 sense the 3300 and 3800 have the same heads ( correct me if i am wrong) and swap over one with roller rockers for more air flow.
and i have seen someone build a custom turbo for a 3300 so i may look into that also. (if you know a site or a thread please post a link )