I have a 1984 vette that I built up a little. I put a new cam and lifter kit (.444/.466 lift), renegade intake, edelbrok aluminum heads (64cc) 185cc runners, jet stage 2 chip, magnaflow cat, kbd mufflers. I did get headers but they didn't fit so I sent them back. Anyway here's the problem; when we got everything back together and in their right spots and such it would rev up pretty good in park (has a dead spot at first but it always has) but when in drive it won't pick up. 1st gear doesn't seem too bad but as soon as it shifts into 2nd it just won't go. We thought maybe it was the cam so we took it back out and put the stock back in, no help it does the same thing.
I've been trying to figure it out for a couple days. Did about everything I could with the timing and nothing works. I have to turn the distributor cap to where the rotor is almost pointing towards #8 before it even wants to run. Could I possibly need a custom burnt computer chip?

The timing chain what was in there had a lot of play so I replaced it with one I got at autozone, we did tell them 84 corvette but the new crank gear has 3 keyways. We tried each one.
I did have to get new spark plugs for the heads but I gapped them to .045 like the car says the gap is

You Tube

The timing chain is the exact kind he has in the video and we put it on correctly, the fuel pressure is ok as well, it's always had good fuel pressure. Could the heads and intake possibly require me to get a tuned computer chip?

I've tried that with my dad in the garage with me, but I'll go back out tomorrow and recheck everything. And yes I did disconnect the esc wire when using a timing light to time it, still didn't make a difference it has to be advanced almost to where the rotor is pointing at #8 tomwant to run. When timing is set at 0 it idled at about 400 rpm and any kind of throttle would make it backfire and die.