Can't help on the body/paint question, but another local carb place woth considering is Joe's Carburetors in Lynnwood. 5516 186th Pl SW Lynnwood, WA 98037, (425) 774-5504. What kind of carb is it? Unless your engine has been tweaked quite a bit, odds are good a 600 cfm Holley or Edelbrock will run too rich unless it is rejetted.
"Life is what happens to you while you're busy making other plans."
'66 GT Fastback show car, nightmist blue, warmed up original 289 & T-5Z, 3.80 trac-loc, AC, PS, pony interior, Retrosound, rally pac
'66 Coupe driver, Bullitt green, 302HO w/ 351W heads, roller rockers, Holley 600, T-5Z, 3.55 trac-loc, collapsible column, tank armor, disk brakes, shoulder belts
'11 BMW 335i X-drive, 6 speed manual, all the bells and whistles