Another guess my SB 340 et 1/4 mile :)

340Duster247 said
Wqs just loading up the engine. Spoke with my engine builder, and the new convertor was a must.

Fix the ignition system... initial, total, curve because that should not be loading up.

If you don't know what the initial timing is and only know total, that's likely part of the problem!

If it hooks and runs well, it should go 12.00 on engine and 11.00 on juice.