Promaxcarbs.com I'll take a set of used ones worked by him over a brand new set any day of the week.
http://promaxcarbs.bizland.com/id1.html
Promax is in indianapolis. i don't understand why anyone needs Promax for a 6-pak.
a few reasons
1-his restored carbs are awesome, coated, rebuilt, tuned, their work is about the best I have ever seen, since I have restored/built 11 cars in the last handful of years, I have seen a lot of work from outside vendors, he has yet to let me down.
2-Price, very fair
3- rear baseplate is awesome, saves a lot of bs..
4- his jet plates make tuning and engine changes much easier, and I have noticed the run better.
The 340-6 in the challenger spun a bearing, so we pulled the motor to do the work, sent out the crank, put new bearings in it, and threw it on the dyno. The carbs were running rich, these were brand new. Probably what caused the spun bearing...
Anyway they tried to tune the carbs back and forth, with the af meter on the dyno, even brought in a "6 pack specialist", at the end of the day the 6 pack whisperer said to send them to promax... So instead of sending brand new carbs to be rebuilt, we sent a used original set, they came back dyno tuned and ready.
Sadly the motor couldnt stay on the dyno waiting to get the carbs back so it got thrown back in the car with a 4bbl that they did tune on the dyno..
6 pack came home, and got bolted on. NIGHT AND DAY, it made me a believer, bolted them on and turned the key, got it started, retimed it a bit and didnt have to touch the carbs at all!!! Pulled out of the garage out to the street and stomped on it, the car blew sideways and laid tire all the way down the street. I was shocked, I simply never had the luxury of just bolting on a carb and going down the road, ESPECIALLY a 6 pack...
Having had to play with a few 6 packs I am sick of it, my time is worth too much to spend a day tuning carbs and risk spinning bearings and hurting an $8K engine...
I often change cams and motors between cars, for instance I had a 454 ss with a high dollar big block in, when I sold the car the gentleman just wanted the car running, and preferred a much lower hp motor with better street manners. SO I swapped in a different motor for him, or when I swapped my 39 to FI, I then used the carb setup on my buddies 55 F100... So the 6 packs may need to be tuned for something else in the future, maybe a different cam maybe a different motor all together, having jets and the rear plate makes that much easier...
NOW if you have the know how to rebuild 6 packs and dont mind doing it, sure go for it, but them things are tight in there, they suck just to bolt on and setup the linkage and fuel lines. I don't like messing with carbs. I figure it this way.
I can get a rebuilt dyno tuned carb for $400 sent to my door, bolt it on a drive the car, thats less time leaning over my painted fenders for the same of not less than I would spend on a new carb, which I don't know why but suck. I have gotten edelbrocks out of the box that leak, suck air, etc. Barry grant with the wrong parts installed in it, and Holley has also screwed me a time or two over the years too...
Well that is my story, I like promax, nice guys, good work, fair prices and they do what I dont want to do better than I can do it if I did...
BTW- its costs about the same, figure a new set is $1600, a used original set that needs rebuild can be found for $600ish then depending on how far you go you can get them done for $600-800 you are ahead of the game...