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

Wow lots of great info guys!!! It feels good to get some great input.
I already bought the converter ,but hey I'm not to upset.
Ill go to speed shop tommorow and grab a msd pro billet. Just called my buddie who works there and he said he had one in stock.

Ps if any of you boys remeber " Jimmy-boy" on here, I'm his son. I'm sure he got to know a lot of you when he was wrenching on his 69 valiant signet