Thread: Pulling the TBI...then what?

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Originally Posted by tango

The hole for the push rod is under that plate not the plug ? If it's there .

Well I pulled the plate and the plug and indeed the pushrod hole was behind the plug itself.
Pictured below are first, the configuration as depicted in Tom Wilson's book, How to Rebuild a Big Block Chevy...

The next picture shows how the holes are lined up on my block.

They look identical to me....

Which means, my '89 block was drilled out for a mech fuel pump.

Now to determine if I actually have a cam lobe to make a mech fuel pump do its thing, then find a fuel pump and pushrod combination that will work.

Thinking of just flipping the motor to one side, sticking a chopstick or wooden spoon handle into the pushrod hole, give the crank a few turns and see if it moves up and down.

If so, I think I can safely assume there is a lobe. If not, back to the electric fuel pump idea.

Kurt
'72 Elky in resto

From the sound of it, somebody put the EFI on an older, carb'ed engine. Good thing for you! Chances are there's a lobe on the cam, too. Sometimes lucky is better than smart, or even good looking!

Originally Posted by R Pope

From the sound of it, somebody put the EFI on an older, carb'ed engine. Good thing for you! Chances are there's a lobe on the cam, too. Sometimes lucky is better than smart, or even good looking!

Ahh, the mystery continues.

Casting # on the block is 14015443, which translates to a 454, 87-90, 2 or 4-bolt, Mark IV, (Truck, Motorhome).

Block casting date is B039 (February 3, x9, or '89 in this instance.

And the old, crusty, intake serial # is 10052952, according to this website is for a 454, 88 Truck, Cast Iron, Oval Port, Lo-Rise, TBI or Q-jet carb.

All this adds up to the block having actually come from a '89 1-ton pickup - what the previous owner told me it had come out of.

Just another one that snuck out of the plant with the fuel pump/pushrod holes drilled.

I love unlocking the past behind a motor, don't you?

Kurt