Last week I did get a brandnew REX S7TC (in exchange of a bottle of Whiskey), it is a model of 15 years ago. I must say I do mis a lot of power in that engine, 3 years ago I did get a Nova 2000-8p from around that same time (1993) and that engine did run awesome compared to most current engines.
Regarding this engine, I think the combination of the C3 set and C6 crankshaft it can't go wrong.
If I may ask, what is the actual price ?