750 on a 318

Before you chastise me hear me out. Right now i,m tapped out. Wife had hernia surgery and crappy insurance left me a hefty bill to pay so no car bucks. I have a 750 proform mechanical secondary carb thats almost new. I want to try and use it to get by for now. I stuck .067 jets in front and a pair of .076s in the rear. This should lean it out quite a bit. Does anyone know if plugging a couple air bleeds front and rear will correct it enough I can run it with no problems 318 is basically stock with a set of headers. Plan is to get a 600ish spreadbore when money allows. I have a plug in the back power valve and will adjust the secondarys off as much as possible. Any suggestions on front powervalve or different jetting? thanks DD