fuel injection

[roundedline]

This is just my opinion, but I would break down and get an 87 intank sending unit that has the EFI connections already on it.

I don't think it is feasible to poke a hole where it is located.  You can probably drill the hole and put a tube through and weld/braze it in...

Best bet is to call Holley and get their recommendation.  I had one of those a while back and they said not to use the vapor line....

Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project

[mike357]

What year is your truck? my '80 model had a return line coming off the fuel pump. i used it for the return line for my TPI unit. i dont know when they started using return lines, but i am sure some one here knows.

[ChevyGuy]

Ill get the sending unit out of the burb.

[tx5.7travel]

I am considering a Holley Projection kit from Summit, a bit pricey but I do not have time to piece together a kit. I was curious if any one had any input on this unit. I do not plan on making huge horse power but rather instead just wanted better gas mileage for my lead sled. 275 ponies will be enough! Thanks for any and all input.

[beastie_3]

I have thought about doing a aftermarket EFI type kit, but the $ has kept me away. You should be able to download the instructions so you can get an idea of what is involved.

[ehjorten]

That looks like one of the early systems from Holley.  It is an analog fuel injection system.  IIRC that little black box is for closed-loop operation.  It added an O2 sensor into the system that did not have it.  The early systems were pretty crude, but worked okay.  The only problem with an analog system is that it goes out of calibration over time and can be a real headache.  With digital it basically works or it doesn't.