2, in the front only. The rear has leaf springs.
Yes.
on a 91 blazer s10 4wd
I belive you have the 2.5 in that case the coil is mounted on the bottom of the intake manifold above but rear of the oil filter
No.
91 miles
I would recommend checking your distributor or coil packs depending on what you have.Plug wires and plugs.
Yes
any first gen s10 0r blazer or bervada grills will fit
91
No.
8-10 psi
No !