I received a Quick Fuel/Proform main body recently that was purchased under a Proform part #. Close inspection revealed that 2 of the 4 annular boosters were not installed correctly with respect to being perpendicular to their respective venturi, and 3 of the 4 weren't installed tightly enough to keep me from turning them with my fingers.

I, also, recently acquired a nice home-made annular booster installation tool. So, in my case I was able to drip some Loctite 290 into the venturi sides of all 4 boosters and tighten their swedging to resolve the issue.

This is simply another reminder not to assume that just because a part is new in the box that it's "right" and ready to use.

Everything needs inspected these days. Except for the top shelf or custom places, QC has become pee poor in the race to the bottom of the price point.

Brad....do you still have one of the BG main bodies with replaceable boosters?

It would be interesting to see if there is any power difference in the two different shaped air entries.

How about...
BG RS 1.425 vs QFT/Proform 1.45
BG GC 1.500 vs QFT/Proform 1.52
... all downleg boosters?

Yeah, I can arrange that.

Not sure at the moment what the big venturi annular 4150 options will be.

Man made and mass produced so ya, check everything and some of you guys have seen my findings on FB w/a few different brands of carb stuff and no different than heads, cams rockers gears etc. ANYTHING we purchase needs the fine tooth comb approach and good for you Brad on finding and fixing the problems although you shouldn't have to..........

Yep,

Been there done that

I went to there warehouse in Metro Detroit and went throuh 4- 950 main bodies till I found one that was decent. The zink main bodies were great, the aluminum, not so great on the QC

Brad, what size is the annular body you bought?

I suppose one way to (hopefully) avoid such qc issues with a carb body, if someone were looking to do some experimentation, would be to buy one that's been "done" buy a carb shop.

Several years ago I bought a couple of bare(and when they say "bare" they mean it) genuine Holley HP bodies to build up into carbs....... A 950 and a 1000.
I built up the 950....... Works "okay".
Never got around to doing the 1000...... Although I have all the pieces to do it.

My billet QF metering blocks were full of shavings and some threads were stripped... My zinc plated Proform main body that I got ~15 years ago was great

I bought a few of those original ProForm zinc bodies..... Like 12 years ago or so.

Mine had a pretty noticeable lip/step in the Venturi where the upper and lower halves of the mold met.

I also didn't care for the way the booster feed area was finished off.
The Holley boosters have a nice radiused entry into the booster, whereas the PT body had a sharp squared off entry.
I never did any before/after tests to see if that really matters or not....... I just put a radius on them to basically mimic how they come from Holley before I put them into service.

I built a few new carbs from scratch out of them....... And they worked pretty well.

I also built a new carb out of the Holley HP replacement body a couple of years ago, QFT blocks and billet baseplate, aluminum bowls, etc........ Still haven't tried it on anything yet.

Oh, here's the "fixed" main body, the annular booster installation tool I picked up, and my "custom" booster alignment tool... a big punch wrapped in foam & masking tape to keep from scratching the boosters when I'm working them back-n-forth to get them right.

Brad, how are the booster feed entries finished on that body?
Radiused or squared off?

Not squared off (I've seem some of those before, especially w/ the last of the BG sh!t), but not a nice radius like Holleys (used to?) come with. It looks more like a wedge-shaped tool was used to flare out the end, but not as steep as the angle on the tool I picked up.

When I was done tightening 'em up, my tool left another angle on the outside of the booster swedging... kind of like the top cut on a valve job.

If boosters don't look like they have a nice transition at the swedging (is that even a word?), I'll do my own or work to improve the entries.

Hmmm... a main body without any boosters. What to do, what to do...

after your post I checked mine, looks like the same one you bought, 2 loose AN boosters, I just put this carb together about 2 months ago, Thanks Brad for reminding us to check even the simple things.

I hear ya'. Even though they don't feel loose, last night I put Loctite 290 on the venturi-side of the boosters in my QFT/Proform 1.45 to be on the safe side. I don't need to worry about the ones in my QFT/Proform 1.52 'cuz they were installed by a carb builder in Florida and I KNOW he used Loctite.

This kind of stuff is enough to make you lose your mind on occasion.

Green Loctite!

Everyone, in every business, and on the road, is lost in social media, and the magic phone of security, and happiness. Quality of work, or even attention to it are very, very low priorities now. The payment for sub par work is the only priority close to precious companion phone. Because without constant, and ever increasing funds, the precious, and all it's magical powers will be lost.

now THAT might be the closest explanation yet !

EVERYONE is a BIG word and I promise you I nor most of the good people I deal w/do not fall in this category..........but I get it and no monkey see monkey do in my world cos $$$ is the gift for GOOD work and greed is unfortunately all around along w/poor quality...........

And speaking of the person who installed the BLP boosters in my QFT/Proform 1.52 main body...

Oh, in case anyone was confused, the original Loctite 290 is the "green" Loctite, although IIRC they have come out with some other 290 variants. Mine is definitely the "green" stuff.