13's, stock '71 318 short block.

With a dual plane intake, you can run a pretty big vacuum secondary unit without worry.

Good luck with it, man. Call Lenny at Ultimate. I've got his custom T-brake, balloon plate converter in mine, cost about $850.00. He says the street stuff is right around $500 so I think he could help you out, and I know it would work better than a shelf converter.

Tell him Steve sent ya-LOL ;)

I wish I was closer. I'd love to help you out with this.

Steve