Why would someone want to swap to a T cam? Did you read this thread? To create improved torque, improved dynamic compression and improved off idle performance. The T cam has more lift than the M cam on the intake lobe, and although the exhaust lobe isn't as big as the M cam's, the increase on the intake side and short duration make up for it. Yes, it will not make much power above 5,000rpm, but you can set the valve clearances tight and have reasonable performance up there. I did a 17.3 second 1/4 mile in my 1987 244 AT vs a 17.6 second 1/4 mile with the M cam, with both of them set tight and the same ignition advance(I still revved it out to 6k when shifting). It's an upgrade, and perfect for someone who doesn't rev out past 4k rpm except on rare occasions. Especially if you're going to be towing.I seriously don't understand why you would even want to swap to a T cam.
Read into cams and take a good look at the specs listed, The T cam is one of the worst things you could do to any NA engine..
With an auto or low rpm towing get yourself an A cam (or something equal), Really packs a punch under 3k rpm but drops off after, If you'd like to have it slightly more balanced free revving get a V, And from there you'd get into the slightly sporty cam's K, H & custom. The rest of them simply ain't worth the swap IMO.
You make it sound like you've compared an A and a V back to back in the same setup. Have you, really?