[LKLusza]

One other option might be one of Holley's in-tank pump /regulator combos. Here's the listing for your Firebird: https://www.holley.com/products/fuel...s/parts/12-304

The neat thing is that you retain your stock tank. The pump and regulator are mounted on the pickup, so there is no return plumbing to worry about. The regulator is pre-set to 58psi. So all you need is the stock steel fuel line forward, but remember to replace any rubber line with EFI rated hose and clamps. On the FiTech throttle body, cap off the return port and the possibly the vacuum port to the built-in regulator. Something to think about anyway.

fwiw, I did this "dead head" style setup previously on my '38 Chevy street rod FiTech setup. But as these new Holley products weren't available at that time, I used an in-tank pump with an LS-style Corvette fuel filter/regulator unit instead which shortened the return as much as possible. I wish something like this was available back then.