Keith,
I have a 67 230ci OHC Sprint (4 barrel) engine in a Fitch Firebird.
There fun to drive because of the 6500 rpm redline, lots of torque, From 0-60 I think it can keep up with most any factory v8. It doesn't have much of a top end. The only way to go in my opinion is with a 4 speed and it has to be a Saginaw with a 3.11 or 3.50 first gear.
Another great source for info is
http://pub83.ezboard.com/bsohcsix
-Rick