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Engine swap- Electrical dead

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Old Jan 27, 2018 | 11:51 PM
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Default Engine swap- Electrical dead

1975 L-48 auto swapped in a Dart SBC stroked to 407. Using factory rejetted Qjet and log exhaust manifolds, factory HEI.

Completed the swap, replaced all grounds and wires as before, electrical totally dead. I suspected the block to frame ground wire, cleaned off the new paint in these areas, reconnected battery and I heard the buzzer from the ignition key as the door was open.

Removed key from ignition to complete battery connections, put key back in, nothing. No door ajar buzzer, no electrical whatsoever.

Battery fully charged.

The only change I made to the wiring was to splice in a new electric choke to the yellow wire on the wiper motor.

I’ve got a good Fluke multi-meter and a 12v Power Probe, but no clue where to start and even less as to how use them.

Any (detailed) suggestions on likely causes or things to check?
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Old Jan 28, 2018 | 10:30 AM
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Hot wire on big positive stud on starter. Could be curled up in the harness. Big wire is from battery feed. Smaller one is main hot for the whole car.
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Old Jan 28, 2018 | 11:51 AM
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Default battery dead?

V scale, has to be DC read the battery, 12 volts at least
turn on headlights, read the battery again, should be holding 12vdc

test light is your friend for next moves
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Old Jan 28, 2018 | 12:35 PM
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Hot wire on big positive stud on starter. Could be curled up in the harness. Big wire is from battery feed. Smaller one is main hot for the whole car.


This...

Last edited by keithl1967; Jan 28, 2018 at 12:36 PM.
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Old Jan 28, 2018 | 04:51 PM
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Originally Posted by derekderek
Hot wire on big positive stud on starter. Could be curled up in the harness. Big wire is from battery feed. Smaller one is main hot for the whole car.
Thanks, all good now.

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Old Jan 28, 2018 | 05:07 PM
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Originally Posted by darbikrash
Thanks, all good now.

nice!
looks like it was born there,
any fitment issues?
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Old Jan 28, 2018 | 08:24 PM
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Not really any fitment issues, the valve covers are higher to accomodate the roller rockers, this had some interference with the A/C, so I added a slightly longer belt and this fixed it.

Idles just like the stock L-48, but has a little more torque.




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Old Jan 28, 2018 | 09:13 PM
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awhh, sweet,
i could live with that!
thanks for the details.
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Old Jan 28, 2018 | 09:33 PM
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That is a torque monster. Should be fun. What size are the heads?
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Old Jan 28, 2018 | 11:01 PM
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Originally Posted by drwet
That is a torque monster. Should be fun. What size are the heads?
They are Dart Iron Eagle 180 cc ports.



They were not that impressive on the flow bench, with a mild port and bowl clean up they flow about 230 CFM @ .500 lift. (Intake)



But we have a really good valve job



Some assembly pics: (Original L-48 in the background)



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