So I'm in the middle of my LT1 swap. I've read that the 4th gen plastic tank is almost a bolt in swap. I know I'll also need some adapters to go from my stock fuel lines to the LT1 fuel rail. Then I got to thinking. Since I have the whole car anyway, why couldn't I just take the 4th gen plastic tank along with the 4th gen plastic lines and swap it as an assembly into my '91. That way I would have non-rusting stuff(important here in WI), and fuel lines that wouldn't need adapters. What do you think. Any good reason why it wouldn't work? Thanks for the info.

 

Only the LS1 cars had plastic fuel tanks, and they do not have a return line on them. If you have an LT1 car, it should have a metal tank.

 

Ok then, my mistake about the steel tank. I didn't check, just read alot about the 4th gen tanks and assumed they were all plastic. At any rate, can I swap the tank and plastic lines from my '94 donar car into my car and avoid having to use adapter lines? Thanks.

 

The only lines you would have to adapt over are the ones coming into the engine compartment. It's an easy adaptation over and will cost less than going through the headache of running the nylon lines which on the 4th gen car. You would have maybe 30-40 bucks in a set of lines made to fit the original lines.

 

Thanks for the reply. Where can I find conversion fuel lines for $30-40? the only ready made lines I've found are the LT1intake.com lines which run $125. Thanks again for the help.

 

I made mine myself, you can buy the quick disconnect fittings for like 10 bucks a piece, the fuel injection hose costs about 4 bucks a foot, and then get some ends that will screw into the original fuel lines clamp it down and you have fuel lines.

 

LT1intake.com was sold to a different owner. It took me a week and 5 emails going back and forth to get an answer out of him for price and it would take him 2 weeks to make the lines. Its like he didn't want to sell me them.

Z28*****, a member here makes stainless steel lines for $125, and he ships fairly fast. Thats Z 2 8 r i c e r

Try the 4th gen plastic lines if your thirdgen car was originally carbed. Carbed lines end up on the wrong side.

If you know how to make lines yourself or know a local shop who can make them, then ignore what i just said.