I'm buying all my parts for my LS1 retrofit into my 78 Z28 and I'm trying to figure out what is the best route to go for a street car, nothing fancy. I don't have fuel injection as it is right now, so to prepare my car COMPLETELY for EFI it's alot of work. Prepping the tank and installing an internal pump is costing me almost $600 if the figures are correct. This is from Rock Valley prepping the tank for $280 I believe, + $200 for the fuel pump, + like $60 for the vette filter + $$$ for the line and fittings. Or is it better to sump it, and do an external ?? I don't know if an internal pump is better or not. I want to know what some of you think and costs for this. My car is being sent to a shop for the install and I want to do this the right way, but if it doesn't matter either way, I'd rather go the cheaper route if it's not really a major performance difference. I mean.....my current setup is a Gen I 350 with an external pump. Any experienced LS1 guys care to comment feel free to throw me a bone here. This is the last part I'm stuck on, the rest is done.