Bring the #1 cylinder up to top dead center, remove the distributor cap, mark where the rotor is pointing on the distributor body, loosen or remove the distributor hold down and pull the distributor straight up.
carfully
1 8 4 3 6 5 7 2
Yes
It does not have 1 on that year.
You can do this without completely removing the dash. Just remove all the screws then remove the support bar underneath the passenger side of the dash. This should give you enough wiggle room to get the core out.
Yes
unleaded, 89 or higher for a vortec.
yes i does just keep the wiring from that same truck and it should be fine
42 to 45 psi
I have that motor in my 89 Volvo penta boat. But also know that it's in 86 to 89 chev gmc trucks.
try replacing the actuator valve on the front axle
You didn't say what year your Jimmy is, but my '89 has a drop-down door under the front bumper and that's where my oil filter is located. (took me a while to find it). Maybe that'll help.