Thanks dwarlick for posting your honest opinion on a thread that I'm sure has been beat to death. Then brought back to life to only be beaten again. That's what I wanted to hear instead of just HP numbers and which engine has stronger hardware. Sounds like the RB25 gives you a decent grin factor per dollar ratio. However deep in my heart, when I take the '71 out to a late night lot meet, some armchair mechanic is going to ask, "Why not the GTR engine?"...