I mounted four Pinto carbs on a SBC B&M blower intake by welding a plate on the opening and four high rise 32/36 to 1 bbl adapters which have an upper and lower flange over the runners and bored through. This could be done with other intakes, say a 4 bbl. No milling and no drilling and tapping for carb bolts.
I made my intake for a 341 Desoto hemi. Buy the precut intake plates and 4 mandrel u bends. I put a divider between sides. I used the article I'm posting. The worse thing about this setup is the 3 deuces. If the rpm is not high enough when you punch it the engine will bog. If it is in the right range...Hang on. Either va***n secondary front and rear carbs or a single 4 bbl would help.
contact forum member moose he has made wuite a few for mopar flatheads both ins and outs. I believe his website is down, but a PM ought to get you some information.
I've got a **** load of pictures I took of this car at the Woodward Cruise a couple of years ago.. Let me know if you want me to post those...
Lots of manifolds have been made of steel plate and exhaust tubes, mainly for race cars and hot rods. They do not have heat as a rule, and were usually made because they wanted LOTS of carbs and nobody made a manifold to hold that many carbs. They worked well and set records. No reason you can't make your own manifold but it helps if you know something about how a motor works and don't get carried away.
PLEASE POST THEM! This car led to several changes in NHRA rules- the max height from ground to crank centerline for one.
I use 18 gauge for the valley pan cover and 1/4-3/8" for the flanges. I build the plenum out of 18 gauge as well, with 3/8" carb pads welded on the top. Unless I build a removable top in which case I bould the entire top out of 3/8 aluminum tapped for the bolt holes and bolt it from the bottom. I have been known to cross my runners inside the plenum to get more runner length with less height. When I am being real fancy I start my runner our big and taper them toward the head. But I am not sure how necessary that is on one that is not being scientifically engineered.
The Jalopy Journal
