i could put you intouch with a guy who sells 2.5" drawn over mandrel U-bends for about $13 each, plus shipping. i would recommend that you start cutting the Ubends and having someone weld them for a Superiour product (Shit, i just typed that like a freakin canadien) anywho, try that out. i would recommend using a 3" UICP and supplying associated couplers. cuz the TB is 2.75", and i thinkthe plastic fender pipe is 2.5".
if someone has an elbow elimnator downpipe, exhaust and all hardpipes, you would be very likely to hit fuel cut.
my friend did full hard pipes on his 88t Auto, ported elbow, 3" DP and exhaust, and it fuelcut on upshifts w/o any boost control. but we fixed it.
either way, this looks pretty promising. above all else, i highly recommend either rolling a bead onto the ends of the pipe or welding a small bead or sliver of tubing tack welded.