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Timing ring on the harmonic balancer slipping is one possibility.

 

 

“If you can't explain it simply, you don't understand it well enough.”

--Albert Einstein

 

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General consensus is go with DuraSpark, Performance Distributors made to order by the looks of it. Cheaper too! https://performancedistributors.com/product-category/distributors/ford-distributors

I've run MSD 6AL boxes for many years with good success. Be aware that any of the CD boxes that power the coil directly (MSD, Taylor etc) will require the use of an MSD 8920 Tach Adapter to maintain f

I just finished a Duraspark 1 conversion on my 429, used a box and coil from Rockauto and a new custom-curved distributor from Scotty J http://reincarnation-automotive.com/services Seems to run g

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4 minutes ago, Don C said:

Timing ring on the harmonic balancer slipping is one possibility.

No. We checked that a handful of posts ago. Plus, I don't think I'd have the actual symptoms of a thru carb backfire and hard to crank. 

Chris - Born in '73 - Drive a '73

Former Mechanic U.S. Army

1st Infantry Division - The Big Red One

BIG RED MACH 1

Learning a lesson (or three) on the Cleveland every day.

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10° should be easier to start with than 16°.

At first I thought you might be having a carburetor heat soak/percolation problem, but now I'm think something else because it won't start.

The backfiring through the carb can be an indication of a lean issue, or a really bad ignition timing problem. The other possibility for the slipped timing is that the pin that holds the gear to the distributor shaft has sheared. Does your car have the stock volume and pressure oil pump?

Just in case it is flooded I would let it set for a while and try starting it again. Also check your oil to see if it smells like gas.

 

 

“If you can't explain it simply, you don't understand it well enough.”

--Albert Einstein

 

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