My old engine was the 305 TBI. I am puting in the LT1. Do I need new fuel lines? I already got the new fuel pump, didn't know if I needed new lines because of the increase pressure or not.

there metal right? i dont see 50psi blowing the lines apart but you want to use the proper fittings not old school hose clamps

tbi has the same fuel pump and lines as the tpi. The FI V6 pump works also i have heard.

i'm using the old school hose clamps on the rear of the lines by the gas tank but i replaced those hoses with new fuel injection hose. Upfront you'll want to get some lines to go from the intake to the hard fuel lines. Contact lt1intake.com or thirdgen.org member z 2 8 r i c e r,no spaces. Or see what the alternative intake forum guys are doing with their LT1 intake swaps.

I cut the TB end off my stock metal lines, flaired them slightly, and joined them with the stock LT1 fuel fittings with high pressure fuel injection hose, then used 2 hose clamps on each end.