Rough Idle, Dies Shortly After

I Have a 88 notchback 5.0 efi and recently i upgraded the whole engine from summit with their build 306 (heads,cam,pistons,bored out,) along with that i got what i thought it would need to shine, 24# injectors 70mm throttlebody gt40upper and lower intake, Upgraded MAF for 24# injectors. pretty much the whole MR.T starter kit.

Now my issue is when the car starts the idle is extremely rough, and it either dies shortly after idling rough or immediately after i give it gas and let off. i have been able to drive it for short times by keeping the idle high but it doesnt work well at all. It normally will die trying to put it in gear.
i should mention the car sat for a while maybe a year but with more then a quarter tank and then i filled it fresh gas and it started immediately after thew new build but idled poorly since

So far i briefly searched for Vac leaks as well as tested the TPS voltage wich is .99 volts

open for suggestions

Adamo141 said:

What is the timing set at?

Click to expand...

i believe we set it at 14 degrees

A5literMan said:

Going to have to run some codes first. Nearly impossible to diagnose without those first. But yes it could be a vacuum leak. Rule out the electronics first and then look at mechanical issues is my advise.

Click to expand...

i talked to my brother and i guess he just set it by ear we never actually timed it... guess that could be my issue. the rotor isnt even completely tightened lol