I wasn't able to find any headers that fit the older vehicles with the larger shock towers. I ended up going with a Rod and Custom front end kit to replace the brakes and remove the shock towers. Then I used an on3 foxbody turbo kit. I just had to change the crossover pipe a little, other than that, it fit pretty well. On the blow thru carb, you might want to check out the Fitech systems. They are tuneable fuel injection setups that are about the same price you'll pay for a new blow thru setup carb.
'93 LX Hatch - 331
'79 Fairmont Futura Sport Coupe - Novi 1k
'67 Comet Caliente Hardtop - 76mm on3 302