New2oldsw30

I'm looking at this to convert my 1970 convert to Sniper EFI 550-510 system. It says it fits a 1970 chevelle, monte carlo, el camino AND GM A BODY. So I would think they would fit. Just like to double check to see if anyone has used one before I order one up.

Thanks, John

therobski

Try and contact DC2X4DRVR Lance here. I believe he put a sniper system on his 71-455. I may be able to help you. Once upon a time he was not real happy with it.

Mr Top Notch

i have the EFI on my olds 350 t works perfectly so far wet with a external fuel pump set up

dc2x4drvr

I installed the Holley returnless pump, works good. After 2 tuning sessions with a pro Holley EFI expert my car runs great.

matt69olds

The Tanks Inc tank and internal fuel pump is one of the few things I have no complaints with the EFI conversion.

If I remember correctly, they have 2 different tank designs. One looks very similar to a factory tank, the other has the lower front corners trimmed for additional exhaust room.

Id strongly consider upgrading to the float less style sending unit. The float on the standard sending unit isn’t very accurate below 1/4. From what I have heard, the float isn’t heavy enough to fall on its own once the fuel level drops. Some people have “fixed” this with brazing a large nut or washer to the float arm.

It’s embarrassing to run out of gas!!

Mr Nick

If you have not already purchased a Sniper, I highly suggest you skip the Sniper 1 and get the newer Sniper 2.

olds 307 and 403

Also have this in my stock 70 Cutlass S, seems to work OK for the SEFI but I'm not making big power. I went for the bigger pump, just in case, for future considerations.

New2oldsw30

Sorry, work, life and slow upgrades I haven't moved forward with EFI yet.

Still note sure if I would go this route with the intake Holley pump for my Sniper? I do have an external 450l pump now, so do I need to spend the $$$ for this? BUT more importantly is I might be swapping out the tank and therefore the Holley system might not work with the different tank.

olds 307 and 403

If your pump puts out enough psi and is properly positioned, it should work OK for EFI. I know one guy with a 71 Cutlass who had issues with an external pump and a Sniper EFI.

dc2x4drvr

The Holley EFI requires 60psi.

New2oldsw30

I ordered a Walbro 450 pump. Basically un upgrade over the pump that comes in the Sniper kits.

olds 307 and 403

Mine puts out 65 psi, 64 psi hammering the throttle around a corner with a 1/4 tank, according to my Innova fuel pressure gauge.