1987 GMC V1500 Longbed TBI Issues

[NastyBuzzard]

So from a little research;

TBI cam : 165in/175exh .382 int lift/.402 exh lift Lobe Sep: ?

Vortec Cam: 191int/196exh .414int lift/.428 exh lift Lobe Sep: 111

LT1 Cam (94-95) 203int/208ex 450 int lift/ 460exh lift Lobe Sep: 116
(96-97) 205 int/207 exh 447 int lift/459 exh lift Lobe Sep: 117

1987 GMC V1500 longbed, Currently my setup is 92 engine w/ swirl port heads (I'm guessing), vortec cam with roller setup, msd igntion coil, stock tbi, long tube headers with 3wire ac-delco o2 sensor, serpentine setup with higher amp alternator, stock spec fuel pump, I did an electric fan conversion, transgo shift kit with corvette servos, and also have swapped the front & rears to 3.42 gears w/ 32" tires, originally was 3.08s.

I have rebuilt the 92 engine, it was bored .030 over. I rebuilt the trans to stock spec w/ oem spec torque converter as well. Then added the rest of the stuff listed above.

Currently when it shifts to 45 when warm and torque converter locks up it feels like it has been kicked in the nuts, drops down to 1200ish rpms and lugs until I get back over 1500 which is over 55 mph. Now when the truck gets to 60mph + it feels like it has all the power it would ever need.

Also an issue that is happening is sometimes after its warm and I park it and let it idle, it will idle around 550ish rpms and then when I go to put it into gear it will shut off and die. Will start back up fine though, also it has just died in park twice from sitting at that low rpms.

Any ideas what could have gone wrong or is my setup bad? Need a tune? Anything you can think of? Is the vortec cam hurting me to the point I need to swap to an LT1 cam or something?

Any info is appreciated, I love this truck and want it to run correctly!

Also, how do yall tie into ign power? I kind of have it rigged for the 02 sensor and electric fans.

I have the Holley TBI but I didn't see a point in putting it on b/c I haven't really added any power that would need it, plus haven't really felt like Id need a tune unless I swap to vortec heads, but they are hard to come by for a decent price here. I did hear that L98 Heads (10125377) work good? Anyone else heard that?