i have a 350 (5.7) engine to modify to carburator, the electric fuel pump is u/s, and i can see a receptacle to attach a mechanical fuel pump, but...
there's no hole for the pump pushrod, this block was originally a 87, single piece rear seal, electronic crap, with the heads having the different center bolts pattern for the intake manifold, and the valve cover attaching bolts are on the centerline.
is it possible to send the block to the shop to drill the hole for the pump pushrod? or should i go with electric pump?regulator (5psi) assembly? and last but not least...what p/n for an edelbrock performer manifold (not perf rpm) non egr. to fit with that different bolt pattern?
thanks for your time guys.
Fernando.

 

That's just a block-off plate. Remove it!

 

there is no bloddy blanking plate.
you can see the holes for the pump attaching bolts, but inside it is solid casting and thats it.
so i believe i'll have to use an electric pump and pressure regulator.
thanks anyway.
Fernando.

 

i put a mechanical pump on my '91 Vette L98 with no problems, everything was there

 

I thought they didn't cast a provision for a mech pump beginning with the LT1.

Could it have been feeled with concrete ? Since it still has the bolt holes for it.

Ron

 

I just went out and looked at a late-model one-piece rear main 350 I have laying around (1987 vintage, original 350 TPI engine). It is drilled for a fuel pump pushrod.

 

Not all roller blocks had the hole for the Pushrod ,I hav two ose has it and the other on has the mounting pad but no hole for the pushrod. A shop should be able to do it BUT I doubt that it is a common request so I would trust a shop to do it unless they have done it a few times before.

 

exactly as evil t/a says.
mine has the mounting pad for...but no hole for the pushrod, nor holes for no blanking plate at all, so is simple...
i'll go with electric pump and a press. regulator to 5 psi.
thanks to all for your help.
THIRD GENERS FOREVER!!!
Fernando.

 

My '87 SC that had an LG4 stock has a low pressure electric pump in the tank. That could be an alternative if you don't want an inline pump.

 

...That, or the 82-83 crossfires used a low pressure electric pumps.
I think it was around 15psi or so, about what a blue pump puts out.
That's a bummer, cause I've got one of those holley mechs with the #10 & #8 hook ups, and it's hard to beat!!! The damn thing flows like 170gph. They use the same pump on those 800+HP Cup cars.


Ron

 

cool stuff.
but i plan to use my edelbrock 1406 600cfm and as per the edelbrock guys more than 6 psi will flod it and also that 5psi is perfect for it.
i may use the pump on thae car i'm using now with a restrictor, i'll see if i can do it, i have a press gauge anyway so the end will be 5psi wichever way i do.
fernando.

 

If you are going to drop your tank anyway just put in a carb pickup and use an externaly mouted fuel pump. That way when it is time to replace it you will just have a couple of bolts and an ghour instead of an afternoon full of throwing tools and cursing.

 

my 87 305 has a mechanical fuel pump?????

 

hey evil, can you suggest a part number for that pump please> thanks in advance.
and for rst top guy, i think you have a submerged electric pump
Fernando.

 

I'm running a 1407 with a holley regulator. I run the fuel gauge off the regulator, and it's set at about 6. I also run one of those nifty Eldelbrock filters w/#8.

I just dropped a piece of fuel hose in place of the stock intank pump.
Of course I also plugged the return line.
This has been good for a couple of years, but big changes are coming this summer. Fuel Cells, Al #8 fuel line, etc etc...

Ron

 

My '87 Roller 305 has a block off plate, but I'm not sure what's behind it.

I do know that your cam WILL NOT have the lobe to run a mechanical fuel pump pushrod, unless you change it to one designed for it.

So it's pointless anyways. Blockoff plates are made to block it off for an electric, not the other way round.