So according to one person over on v8monza.com the 94 Buick Park Ave sending unit/pump work fine in our tanks. I helped one guy and we made a baffle with a sheet of fairly thick sheet metal from Lowes, used a greenlee punch to punch holes in it. The holes nearest bottom we only used 1/2 holes at base of baffle. Then we simply cut the top and bottom of tank with cut off whe tapped baffle in with allowances for sender arm, and tig welded top and bottom. also we soldered in a 1/4" pipe fitting from an old copper/brass rad tank and installed a pipe plug so we could drain tank easily. If he hadnt centered the tank to middle in back to run tail pipes on each side I might have talked him into installing regular petcock but then it would make steeling gas easier.
We smoothed top of tank where it meets body so we could center it up for tail pipe clearance. After dumping torque arm you would be surprised how much room is under a Monza for regular pipes. He also got a quick and dirty version of the rear crossmember I am trying to get finalized so I can get someone to bend me a few up to sell. It gonna go pretty much even with top of trans tunnel, allow adding upper control arms in bot 4 and 3 link versions. I am going to tie it into rear seat belt mounts in floor as trans tunnels is said to be as much as 40% of stiffness. Thus it will stiffen the rear of car, delete torque arm which eats up undercar real estate. also allow removing Panhard bar if in 4 Link mode(will have both parallel or triangulated ability. Also got plans to work with Jim Fays and make a bolt in Fays2 watts link .
My hope is to make all three models of S10/Blazer rear axles a near perfect bolt in. THUS allowing us 8.5 10 bolts as well as later 28 spline 7.5. My main reason is I just installed my 7.5 as a swing arm with cut down front of springs as swing arm and other than I should have cut loose and rewelded or replaced spring perches a 2wd slides right in.
Yes the short arms act like small ladder bars but I had 275/60s under mine.
Oh crap I got off topic.
94 Buck Park Ave with SC fuel pump/sending unit should feed most anything you need, just use good return type regulator.