turbo with a carb?

You would be better of buying a carb from CSU or one of the blow-thru specialty shops.

Other than that, you need a decent pump with a boost-referenced regulator and a hat.

The write-up for converting a holley is:

Blowthrough Carb How-To

you would also want a boost-referenced power valve:

How to make your own BRPV's at Home. DIALUP BEWARE!

and read though theturboforums.com a lot

I am just finishing up my blow-thru combo. Junkyard Holset H1E, stock shortblock, ported e7s, weiand x-celerator and my converted holley 650. Hope to make north of 500rwhp

go over to turbomustangs.com and look at there forums lots of good info there.