Have replaced starter 4 times . it kicks back and cracks the starter at the nose . 1986 gmc sierra 350 , v8

10 hrs plus .2 if you have an A.I.R pump + .2 if you have cruise control, .5 if you have AC, .3 if you have power steering

what exactly do you mean by "kicks back"
IN all engines if the engine fires hard against the rotation of the starter motor, it indicates that the ignition timing is way too far advanced
GM products are around the 10 -12 DEgrees BTDC static timing and any thing over that will cause problems
If the timing is right then I would be considering replacing the crank position sensor and/or the ignition control module

How to set ignition timing 88-95 GM fullsize truck Silverado ...

? 10:56
https://www.youtube.com/watch?v=y5NuS-G-cKI
Dec 5, 2013 - Uploaded by Ghetto Wagon
I thought the parts when the engine was running would come out better, but its just too loud. ... How to set ...

1995 GMC Sierra V8 5.7 Distributor Timing - YouTube

? 3:14
https://www.youtube.com/watch?v=mK5N5mCmyok
Jul 28, 2013 - Uploaded by sprek2
I had to time a distibutor on a 1995 GMC Sierra V8 5.7L and was having trouble finding the wire that you have ...

Info on V8 Engine Firing Order - Offroaders.com

www.offroaders.com/tech/V8-engine-firing-order.htm
Firing Order of Most Domestic V8 Engines by Diagram.

Chevy Engine Firing Orders 283, 327, 350, 400, 427, 454 ...

www.mre-books.com/chevy/engines/firing_order.html
At this site you can find the firing orders for Chevrolet engines. ... 1987-1989 ... 283, 302, 307, 350, 396, 400 and 454 Engines Firing Order, 307 Engine Firing ...Missing: degrees images for Firing order diagram and timing degrees

I believe a 96-98 harness from any chevy or gmc would work. V8 to V8 not V6 to V8 the 305 and 350 would be the same harness

I would say that you probably have some bad plug wires. Replace them and see if the problem goes away.

The bar is simply a brace. On one that old, it may be difficult to get from a dealer but you may find one in a scrapyard. Problem is that to save time, many techs used to leave it off when changing the starter...Most will work without it but if the engine kicks back due to a bit of moisture in the distributor cap or any other item that can cause a cross-fire, if it's not in place the starter nose will break.
If you can't find one you could actually make one using a piece of steel Any support there is better than none at all..

If its spinning than the nut inside the pad has broken its welds to the pan. Replacing the pan is the fix.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

disconnect the battery lead from the starter plus other wires,undo the bolts on the starter flange & the starter should pull straight out providing there is nothing else in the way if there is anything it will have to be removed first.......hope this helps......cheers

2300????? Huh. I though they were 1500, 2500. i could be wrong. ususaly in the 3/4 tonne vehciles, they have a small block V8. I hae seen quite often a 350 cubic inch...but, depending on your transmission and engine braket mounts, not to mention mechanic skills and fabrication abilities, you could put whatever you want in it...As i said, probably a 350 small block is what was in there...probably

The high pressure and low pressure hoses are different sizes at the gear box. And the low pressure /return hose is usually rubber with a clamp at the back off the pump.