Where can I go for harness modifications

[pro]

Getting vacuum to the booster is not an issue at all. Just unhook the hose from the brake booster check valve, throw the TBI metal line away and use bulk vacuum hose.

I swapped my Express to hydroboost and love it.

A TPI will not even attempt to start at TBI pressure.

You will need a F or B car passenger side bracket for the compressor.

Like I said though, have personally done the swap on an older G-van and it really was not worth it. The torque curve is wrong for a heavy truck. You loose torque in the 1,800-2,800 rpm range compared to a good dual plane and the runners will choke the engine at about 5,000. You can rev to 6,500 with a decent cam, good heads and speings but the power stops building at 5,000. The TPI did not offer any real fuel economy benifit either since it is batch fire.

I havent puchased anything and am still thinking about it. I'll be out of service for a while soon anyway with plenty of time to study it anyway.
The motor redlines at 4500. I rarely even leave past 3500 anyway. But how do long runners reduce torque?
BTW, is this the TB you are talking about:
http://www.ebay.com/itm/94-95-SILVER...-/201877793319
What manifold would you recommend with it? I would need EGR for emissions ( i am in TX, euless as well )

What options are there for supercharging? i remember back then there were prochargers, whipples, and wynjammer. i see wynjammer is still around and selling.