I see this is from March so I don't know if you will get this or not but I will reply anyway. I am currently doing almost the same swap except I am keeping the 4L60E and my engine is from a 95 Z28 (aluminum heads). As far as the wiring goes, you need to get the original wiring diagram for your car
http://www.fastgm.com/wiring/ and the wiring diagram for the 95
http://www.thirdgen.org/techboard/lt...g-dummies.html (LT1 Wiring for dummies) . in this article you will need to scroll near the bottom, you will find many diagrams in the beginning of the arcticle but none of these worked for me. If you scroll down you will find links to jpeg files that are very accurate. In the first link (for the 91 wiring) you will need to make sure you only use the pages that are for VIN E cars, which should be what you have if it is TBI. With both of these diagrams you should be able to do the swap wiring very easily. Now to the good part! since you have a 95 LT1 (IMHO the best due to flash OBDI) which is OBDI but flash programmable (No chips) you can buy or make an ALDL to USB cable
http://www.akmcables.com/ic.htm and then get the software
http://www.carputing.com/ . You can also have someone else program it for you but you will have to pay them every time you make a change. The choice is up to you. There is also another peice of software out there that will do the same thing but is more expensive but i think it may be a little more user friendly. Personally, I think if you can't use LT1_Edit you probably should let someone else do the programming (YOU CAN DESTROY THE COMPUTER IF YOU DO IT WRONG !!!!). The software will let you remove the VATS system, air pump, and anything else you want to get rid of, not to mention you can program all of you timing curves, VE tables (not so important with MAF), and adjust for engine mods. Other than that, only one other major change is neccissary. If you are keeping the AC, you must buy a relocation kit
http://www.marchperf.com/pg17.html because the factory AC will not fit around the motor mounts in your 91. That is all you need that I know of so far. If you are still around, or if someone else needs info, I will update this as I finish the project.
Thanks,
Rick