Hello all,

I have a rebuilt 350 I'm about to drop in an 84 Z28, still carbureted. I haven't driven this car in probably 15 years. I don't think the stock pump will handle the 350-400 HP I'm expecting, plus I'd rather replace it before hitting the road after sitting for so long. What's the best option? I'll be letting a shop do everything because I don't consider myself fully qualified, lol. I'm guessing I'd need at least 30-40 GP? I don't know offhand, but it sounds like it more than likely has a mechanical pump currently. I know some had been replaced with electric.

The block is early 90s out of a truck I believe. Stripped down and virtually everything has been replaced on it. Not an LT1 or LS1, but I can't remember which one it is because it's been so long since I did anything with it.

 

If the car is still carbureted the stock pump should work fine but since the condition is unknown it's not a bad idea to replace it. The in-tank pump is a bit of a hassle to replace. I've been running a holley blue pump & regulator for over a decade and really like it, my small block is just over 400 hp and carbureted.

Switching to an electric "pusher" pump that is outside the tank will give you more service flexibility in the future too.

https://www.jegs.com/i/Holley/510/12...UaAhg9EALw_wcB

 

Thank you. Where would that pump mount? And would there be other things that need changed, like the fuel line?

I was hoping to find a decent replacement for under $100, but I can go over if necessary.

 

mine is mounted just outside the tank, just intercept the fuel line coming out of the tank and connect it in. Regulator can go under the hood (mine is on the passenger frame rail right where the fuel line is).

you can search Jegs/Summit/etc for a house brand and probably find something under $100.

You can wire the pump up to the stock wiring or wire it separately to a switch, just depends on your preference.

Any other questions just ask!

 

Thanks! Any thoughts on this guy?

https://www.jegs.com/i/Holley/510/80...02/-1#tab_kits

Some of the kits come with extra parts and wiring but I'm not entirely sure what I'll need.

 

That pump looks like it will work, similar specs, up to 7 psi (which you'll want to drop down to 4.5 psi or so via the regulator). The fact that it comes with the wiring/relay/etc probably makes things easy too.