Apologies for other SRT6 owners who have "heard it all before"....

Here's what is apparently the "bee's knees" or the "ducks guts" of the 3.7L in a C32. Hin Yu's Tawain vased 500-550bhp 3.7L C32 ....(click)

Key here is the interchanngeability of the parts - heads, valves, cams, sumps and charger.....
Note - I'm guessing by the times, they had some more work to do to extrract some better times....
Although I did read elsewhere that the 3.7L M112 walls maybe getting a little thin for "long lifetime boosted" applications....well these guys didnt really let that stop them.

PS
some info on our blocks and the sleaves/treatments employed here...(click).