I have searched and the answer still eludes me; I've shopped and from what I can tell the fuel lines for a 92 305/tbi front to back are different than 88 v6 2.8.

Is it possible to use the fuel lines (stock) in an 88 v6 2.8 for a 92 305 with modification?

I know the engine side is different, but the lines can be modified there without too much trouble. The main problem is the rest of the line(s) - if I put a 92 fuel pump in, will the 88 lines connect to it correctly? Or am I just barking up the wrong tree here?

I guess I could just swap the line set, but the lines in the 88 are newer.

Suggestions?

 

If the 305 is TPI then your only concern is connecting the fuel rails to the V6 lines. If the 305 is TBI or carb then you'll need to replace the in-tank high-pressure electric pump for a low-pressure in-tank electric pump, which would be good anyway, or buy an aftermarket fuel pressure regulator. The kind with a return for excess fuel. That's the more costly option.
The TBI pump installs the exact same as the V6 pump. Simple remove-and-replace.
If your 305 is carbureted, then the TBI pump still makes too much pressure, but GM didn't use a regulator when they tried this, like the '87 LG4 for example. Instead they had the TBI pump feeding an on-block mechanical fuel pump with a return. Cheaper and easier.

 

Well I did mention it's a v6 2.8 to 305/tbi swap. I understand the pump has to be changed, I'm more concerned about the lines themselves.

In other words can I connect a 305/TBI 92 fuel pump to 88 2.8mpi fuel lines tank side?

I'm not concerned about engine side if they match up at the pump.

Thanks for your input.

 

The metal part of the intank sender is the same for all EFI engines, V6, TBI, TPI. They all have threaded fittings, so really just swap the pump and rock on

The hardlines on the chassis should be close enough. Both are drivers side in the engine bay, I cant remember which engines were at 90* vs 45*. Either way no major issues

 

Thanks! I'll post my findings and final solution.