What motor in '84-'85 GSL-SE?
 

I'm pretty sure the '84-'85 GSL-SE came with a 6 port 13B NA motor here in the US, but is it different than the '86-'88 6 port 13B NA?

Also, how much does the car weigh?

Yes and I dont know respectively.

Yes it is different. It's the best 13B between all generations. The apex seals are bigger and better, the rotor it's a little bit heavier than new ones. The EFI system and AFM is different. It has 135HP and 134ft/l. The car weighs around 2500pounds.

they also changed the location of one of the seals on the '86 + engines that can cause easier leaks and makes it harder to rebuild. that from my old mechanic, i'd have to do some searching to be more specific but somebody else might know what the hell i'm talking about and explainit better.