two questions

first here is what my plan is ... i plan on fully rebuilding and street porting my 12a out of a 83 base (it has 233,00 miles on it) can somebody tell me/send me a link to a good rebuild kit that they have used/ would suggest.

i also plan on upgrading my carb...and i dont know anything about them. ive been looking on ebay and i guess they go by cfm's..? wat would be a good cfm for a 12a?

oh.... and ive got about 800 to spend on the engine as of now... im also gonna put a new exhaust on.

thanks for the help