small journal crank, thin flange barrels...use the extra punch from a hot cam and watch it go bang
, or run it with a 334 where it should remain fairly bullet proof if properly maintained and still be good for the ton.
The early super flashes were known for having way too much power for the plunger frame, so personally I'd be sticking to the stock 334 if I were you.
However my B33 still runs a stock cam and carb, but although no record breaker, goes everywhere full tit and has been commented on as "must be hotted up" because some fellow BSAOC members have been left for dead on their lightnings trying to keep up. I just like to ride hard, don't need a fast bike, just keep the throttle open.
A 334 will be better on hills and under 5000rpm -enjoy it for what it is.
I'd love to see what happens if you take a stock early motor to 7200 like I do my race A10. Will go really well for a short time