60-66 Low humps all the same?

[Johnny_Lamebridge]

I see lots of guys installing T5's under a low hump floor. I tried trial fitting my T5 into my 63 so I could locate and cut out the shifter hole, and there was no way I could get the tranny spigot into the bell housing. Today I took some measurements, and it looks like the floor is too low to accommodate the top cover of the T5.

My T5 is from an 87 Camaro with an S10 tail housing.

Is it possible that the 60-63 and 64-66 low floor humps are different?

Thanks in advance...