tbi into 76 vortec heads ?

[BIGWORM76]

ok thanks hopin to start the rebuild on it soon tryin to figure out what all i need

[dave w]

Vortec heads are an excellent upgrade. The stock TBI chip is not going to work very good, so plan on "tuning" the chip to get the best possible performance from the Vortec heads.

dave w

[BIGWORM76]

Ok, i havent got my pcm yet actually havent got my wiring harness either im putting it into my 76 scottsdale i think i have a pretty good grasp on the swap the only thing im unsure of is which wires go to the fuseblock 12v, grd, k/o 12v etc cant find a clear wiring diagram on it, the motors out of a 94 z71.

[EagleMark]

If you study the diagrams while you have a JY harness pulled, you will easily find what your looking for. It's not hard when it's layed out in front of you, don't sweat that part. If I knew the exact answer I would tell you, but each harness from each vehicle is a little differant.

Back to engine, if you are going to Vortec heads, intake is needed, may as well do headers and a cam (preferably roller) to match, stock Vortec cam is OK, I beleive the stock LT1 cam is also a good cheap choice, then of course a load of aftermarket. Then! It is a very worthy upgrade.

With this you do need some chip tuning, will also need a little more fuel pressure.

[BIGWORM76]

awesome any suggestions on what vehicle and year to rob my harness from that will plug up to the 94 tbi and which computer to look for thats easily tunable and dumb question but whats memcal ? thanks !

[EagleMark]

Memcal is a chip in newer PCM, it has the netres and knock module as well. The older ECM had seperate chip, netres and external Knock module.

If you have the E trans to go with that motor you need the newer PCM/harness with memcal.. 93 to 95 chevy trucks. If no E trans you can use older ECM/harness from 87 to 93 trucks.

[BIGWORM76]

ok im using an older style 4 speed manuel trans, am i correct in assuming the older the harness i find the less extra wires ill have to weed out ? and what about ecm which one should i look for ?