Long story short: Got engaged, need cash not a fast ride

1988 firebird Pro/Am

FAST: 350 roller block with LT1 intake + more

$4900 obo

Willing to trade for other f-bodies, Fiero GT, or 3rd-4th generation Corvette.

I just finished building the engine about 500 miles ago. It's an L98 with an LT1 modified intake. Puts out an estimated 400 flywheel horses. No a/c, smog, egr, etc. All removed to increase performance. Has all sorts of work done to it, new alt, new fuel pump (in-tank,) custom cold air intake, Dayco serpentine setup, hypertech modified computer. Also has 3.08 posi rear, brand new rear brake hardware. Lots more, i know this car inside and out.

Problem: After I built the car, the trans started slipping. Was guaranteed for 330-350 horses, but i had just over that (apparently.) It still drives, but only enough to go around the block and get onto a trailer. Trans is (TH) 700R4.