I have a chance to buy an 87 Iroc 350TPI with a blown motor. I found a 95 LT1 motor with ECU and harness for sale locally. My question is do I need to change the fuel pump to supply enough fuel? I am not too familiar with the LT1 intake set-up...

 

TPI and LT1 operate on similar fuel pressures. The TPI pump will work

It would be a good bit of insurance to go ahead and replace it when you do the swap since the car will already be in pieces