Sorry, didn't see the q until now!
The stuffers are as-delivered, set in place with Splash Zone Compound and a 10-24 socket head cap screw under to hold in place. I have seen pictures the ones that bias flow but have not noted that they come from Terry. As for intakes, I have both a 4V Funnelweb (real, imported from AUS) and a CHI intake and those both fit the stuffed 4V heads and match well with my AFD 3V aluminum heads. I have a 351C tunnel ram that I've had on the motor but a bit with a couple of "1850" Holleys for fun but never really worked them hard. The mis-match didn't seem to cause any kind of trouble. If I get serious with the T-ram, I would look for something to fill the bottom of the parts at least an inch or so up to mate better with any heads. Normal bracket config on the 351C is a 650DP on the Funnelweb. I will be trying methanol - again - this season on the 351C with a custom built 750DP. A long term wish is the T-Ram with dual Holley EFI units on the 427 9.2 deck Dart build running both a gas and methanol program.
I have run a 2V funnelweb on the 4V heads with the poor mis-match. Ran well enough in that condition and it was all I had because the 4V was on the wife engine. You are also correct, the 2V ports are not even the same. An intake port will land as you said and in the 2V heads the floor is way flatter and the short turn abrupt. Velocity and flow is good, to a point. I have also done the Xcelerator 2V trick LOL. When people start that "4V port just too big, terrible blah, blah" I just tell them "it's all in the parts combination and the tune up."
I'm running brackets, not Pro Stock so my attitude on port matching is