If i buy a 94 or 95 throttle body and then buy that MAF sensor decoder thing from domestic performance I believe, will this give me the extra 20 horsepower that the 94 has over our 92-93? Also, is there anything else I would need to do?

You'd need the 94 SC, also. And the mini AFC (from ZZ Performance) you mentioned. Then use the stock SC pulley on the 94 SC, and you've got more than 20 hp gain.

The 94 TB will bolt up to a 93 SC, but the inlet on the SC is smaller and the coolant passage does not line up. You'd get a bottle neck for the air, and possible leakage from the coolant.

Port the SC out to match it, and plug those coolant lines

So how can they both be called M62 if the 94 is so much different than ours?

It'* more effecient really, but same basic casting and all.

Most of the change is on the inlet end. Beside what I mentioned, the back driver side corner base is thicker on the 92/93, needing a longer bolt than the rest of the SC bolts. the 94/95 base has the same thickness all around. And the "ribs" on the outside don't go down to the base on the outside of the 94/95.