I had the 61-52e and a Te-62 on my car. Both had PTE 85 exhaust housings.
The results were that at 21psi, the 61 would run 11.2 @121. And the 62 would run 11.2 at 121@ 22.5psi. Very close. My 60ft was always in the low 1.6 range as my slicks were worn out.
The street driving was more pleasant with the 61, I am sure due to the smaller turbine wheel.
My combo is ported heads, 206 roller, Hemco upper, MJ 17 row I-C, and a PTS 9/11 converter. That stalled about 3400.Street driving was a blast with the 61, I highly recommend it.
Thanks, Brian