As above....original motor=keep it original.

If you do end up going for a stroker, I don't think the stock exhaust manifold will suit the engine. After all that work, you want it to breathe well.

Go the 333ci crank....they rev like you wouldn't believe!!! A mate has 333 stroker in his vc burnout car and it happily sits at 8500rpm all day.

Best if luck with mate