Neil,
I havent had it rolling roaded and tbh i wont have it rolling roaded, i prefer to drag race the car, thats what i had it built for and bought it for really, when the engine was first built by Mark years ago now, it made 406 Bhp and 410 torque.
That was on the old spec engine. Last year i went for autronic SM4 management system, GT30 turbo and lots of other good bits for the engine, including NOS, and my swedish gear kit was installed
Still need to get a high pressure header tank, sort my launches out and maybe up the 50 shot of NOS to maybe 75.
All in the power is probably in the early 500s BHP, torque maybe the same not sure tbh.
To me its all about how the car performs over the 1/4 mile.Other people will obviously have different opinions, but i really enjoy the 1/4 and have done since 1993