I thought I would share this with you guys who want a screamer.Try an aluminum block 417 cube, 15.4 compression, 6-1/8" rods giving 745 HP@6800 + 643 lb.ft.@5500. This allows this gentleman to to turn 198mph at 8300 revs in 4th gear on the road course at Pocono. So I quess he has enough power for this Safir supper GT 40. I can't imagine how he gets all of that power to hookup - but he obviously does quite well.