Drive shaft loop that uses stock attachment points?

Anyone know the manufacturer(s) that make drive shaft loops that require no additional holes added to the underbody floor pan or bracing? I've seen them before, but don't know who manufactures the brace? I need one for an A-Body.

Thank you in advance for your feedback!

http://www.manciniracing.com/bofrdrlo.html

There use to be a guy that sold them on E-bay a couple of yrs back. The loops bolted to the transmission cross member so you had to drill no holes. Looked like a slick outfit. I think they were even powder coated. Can't say if he still sells them there or not. Wish I would of bought one back then.

Yep, Mancini.

See the hole in the top of the loop, thats for bolting it to the floor, which means drilling a hole in the floor. I guess you could leave that out, but I don't think it would be very strong that way which would defeat the propose.

www.uscartool.com makes them, sells, and has retailers to sell also

The photo above is the us cartools , I have one in my dart , I haven't bolted it to the floor yet ...

Honestly, it would be safer bolted to the floor, but maybe just 2% safer? It looks pretty solid & all you have to do is make sure the driveshaft doesn't hook onto some pothole when the front u-joint breaks. The loop doesn't have to do anything except keep the front of the driveshaft off the ground, so I think you could leave that floor pan bolt out IMO.

I think I'm going to omit it bolting to the floor.

I put one in my Belvedere, didn't know I was supposed to bolt the loop to the floor. Probably will not bother now.

Not true. The driveshaft will try to swing all over the place and beat the crap out of the floor. I personally would not use that loop without bolting it to the floor. I think that much length, unsupported on one end, would be very susceptible to bending.

I have to admit you make a good point forphorty. I'm not sure about the driveshaft bending, but I'm pretty sure you're right and I'm underestimating the force of driveshaft coming loose. I have personally broken 2 front u-joints + once broke front & rear at the same time and the driveshaft shot out sideways. All of those were stupid "neutral drops" when I was 16-17 & not at the track. From a stop, it's not that bad....but if you had one let go on a 3rd-4th shift at 120mph....that might be bad.

As both ads state "100% Bolt in with NO HOLES OR WELDING!!!"

I don't get it.
If your "racing" the car it is not original.
So with all the other modifications, why not drill one little hole?
If your not racing it there is no need for the loop.

But yet they put the hole in the loop . . .

Can it be installed with no holes or welding? Yep.

Should it be installed without bolting the loop to the floor? IMO probably not.

I've installed 4 of them in cars and I took the time to weld a 3/8" nut to the interior side of the driveshaft tunnel on all of them - makes for easier install/removal later.

This is the response from Uscartool via email. Guess it's up to you if bolt it in or not. I'm just the messenger here.

"Hello ***, it can be bolted to the floor. its optional and intended for full on Race Cars when bolted to the floor, otherwise it serves the same purpose. we just offer the hole as a precaution to those who want the option or more attachment. They are NHRA approved!"

Has anyone broke a front u-joint with one of those bolt on driveshaft loops? I'd love to hear how it performed.