Somehow back about 12 years ago, my father and I managed to talk Jeff @ HRE, Carlon Hine's son, into rebuilding my 340 6-pack T/A engine. Like you said, they really only work contracts on dirt track cars these days. Apparently Jeff had a hankering for rebuilding a 340 6-pack.

Honkin' Hemi info here: Honkin' Hemi

1970 Challenger T/A, 4-speed, EV2
1969 Super Bee, 383 / 4-speed, F8 triple green
1968 Firebird 400 / 4-speed, triple black