Yes
no.
Yes, but 87 octane is all that is needed.
It should the YJ was from 87 thru 95
Yes. The YJ Jeep Wranglers (square headlights) were made 87- 95 - there was no 96 as the TJ was introduced as an early model 1997 in the Spring. The windshields in all YJ from 87-95 are the same.
yes, the 87-95 20 gallon poly tank is primarily the same. Bolt holes for the pump are the same and all the other tubes and straps line up right. Problem is that Jeep has not released this for after market sales either so the price for a plastic tank is $656.00 for the 87 style and $703.00 for the 91, and you can only get them thru a dealer, tell me were not getting robbed for a plastic gas tank. I have a 91, my brother has the 87 and they cracked in the same spots. Now were both up the creek with out a gas tank. Update - MTS Company manufactures an after-market 20-gallon tank for 1987-1995 Jeep Wranglers.
No
It is 91 times 87 = 7,917
91
87/91 is in its simplest form.
87
If the engine is the same then it will work.
87-95 was the first generation wrangler, the YJ. The roll cage should be the same as no major changes to the body were made until the TJ (97-03).