I just got my Proform 950 body ($193) & their billet baseplate ($129).
(Their 750 body is $99, so you can put together a Proform 750 for little over $300)
I used two HP750 metering plates ($55ea), it came with 78/86 jets, and I thru on some
old fuel bowls I had off a parts carb - and I have a complete 950 for around $400!
I wanted a 950 because we have a HP950 Holley on a mild 400sb with a 2000 stall
and it works great on the street/strip, good all-around carb.

I jetted it down to 74/81, since I'm using it on the stock 350 thats in my work truck,
just a bit on the large side wouldnt you say graemlins/clonk.gif The 950 is going on the 383 I built that
will go in the truck - one day. I just swapped the 373s that were in the truck for
some 307 gears, its also got a stock converter too. The truck had a Carter 750,
which was ok, but its got a part throttle stumble, and since I dont know whats with
it I thought it would be cool to try the 950 on it for drivability.

I stuck it on and had it running at first crank, had to idle it up and go over the mixture.
The throttle response is great, and so is the drivability, the only problem is its too big
for the stock 350 at full throttle down low, it bogs the motor down. But once you get
above 3500rpm its alright, it still blows the tires off from a 30mph roll, with the 307 gears.

I've heard of people having problems tuning the Proform carbs, and I think it may be that
they dont know that these bodies are set up for a 4 corner idle circuit. I mean that the
bodies come with 71 idle air bleeds and 32 high speed air bleeds, at 4 corners, so you
cant stick a nonadjustable (without fuel mixture screws) metering plate on the secondary
side, because it would use different size air bleeds. Hope that makes sense for those
with tuning problems.

You can put together a Proform 750 for just over $300 and since they seam to work good,
its a great deal for the money. I'm happy with mine

Cool :cool: I like cheap . . .

It would be nice to be able to see the results of some back-to-back-to-back testing on a combo that is a closer match for that carb. Like your 383 :D

BTW the 750 vac secondary setup I tried with the Proform main body initially didn't work because the jetting on a stock O-3310 is way lean for the downleg boosters in the ProForm body. There is also a difference in the port size that provides signal to the vac can so the secondary transition had some problems. Also, Proform sells the O-3310 style body for a "non-4 corner" carb, so maybe that just applies to the HP style bodies. If I took the time, I could probably get it to run pretty decent - but have been busy racing this summer and haven't taken the time to tune it. I did try it on the street and it did run quite a bit better with 76/84 jets.

PS. where did you get your metering blocks for $55?

Does Proform make a annular booster body (their bodies come with boosters right?)? Do they have a web site?

Got the metering blocks from my local speed shop, but they should be about the same from Holley.
Yes the bodies come complete - with boosters, and I dont think you can get diff types of boosters, but I'm not sure.

502,

Could you help me identify a proform carb set up, not sure if the one I have is truly a 950. The baseplate throttle bores measure 1.75" and the top of the throttle body measures 1.35" at the smallest area around the boosters, the throttle body then tapers down to a larger diameter meeting the baseplate, I cant find any printed numbers around the outside.

Thanks Rich

If you have 1.75" throttle bores, it could be anything up to a 800. Once you get to 850 in the standard Holley carbs, the bore size goes up a little bit. I tried an 850 DP base plate with a 750 DP Proform body and it would not fit without machining the bottom of the main body bores.

If I remember right the 950 had 1.80 stamped on the base plate throttle shafts.
I also compared it to my 1000 race demon, and the body was a bit smaller around
the booster, dont remember how much, 1/8" smaller in dia. I think. Also the body
has 950 stamped on the side where the throttle linkage hooks up.
To me it sounds like you have a 750 body. Also Proform told me that the 950 body
comes from a different mold/casting, thats why its costs almost double for the body.