crossover or x-pipe

Ok, here's my seat of the pants conclusion.
A long time ago,2004,I put a GearVendor unit behind the A-833 in my 68 Barracuda 367. In the process I had to cut out the H in my TTI dual 3s. This was the only change I made. I was running the 2.66x 3.55 gears for a starter gear of 9.44.
Well on the maiden voyage, I immediately noticed a lack of off-the-line-grunt. Immediately. And it wasn't just a little bit. Of course I was schooled in the H theory, but the change was quite dramatic, requiring a lot more clutch-slipping than I was used to.I had already been driving this car for over 4 years, so I was well aquainted with the engine. I spent the rest of that summer trying to get that torque back, in the tuning. Yeah I could of reinstalled the H in a new spot, but two things were at work here; 1) I liked the sound of the Dynomaxers running isolated, and 2) I was on a mission to find that torque in the tune.I like learning new stuff, and I figured I mighta not had the low-speed tune quite right.
So, I did manage to get some of it back with timing and fuel, but I struggled, and it never fully came back.
The next summer, I installed a 3.09 low gearset for a starter of 10.97 and the problem went away. 3.09s are 16% better than 2.66s. I won't say that the missing H was worth 16%, but I think it would be fair to give it 8%.
This torque deficit was only experienced from idle to maybe 2000 or so. I bet guys with 2000plus TCs would never have noticed. But I think it would also be fair to say that if you are running a 4-gear and 3.55s or less,in your streeter,you really aught to try and run an H. You won't have to rev it up like the 5.0 guys do.(I really dislike that.)This was with the 230* cam, and a 10.9Scr/8.6Dcr, and at my street weight of 3675pounds (me in it).
If you are running the regular 2.66 low gear, I think 3.91s or 4.10s will cover the hole. Also, a smaller cam will have less trouble, and so will a lighter car.These are band-aids for sure, cuz the hole, IMO, will still be there. If your M/T car has a hole and no H? Put one in and see. Come back and let us know how it goes.