Engines. ZZ4 replacement

[shithotfast]

I have used a zz4 355HP for the past 18 years in the spyder, 30k hard miles, its just gone bang. piston holed.

Thinking of replacing with something a bit bigger (around 450BHP) but old iron. Where would you suggest I look for a fully built crate/stroker type engine.

Tried real steel who don't seem interesting in selling anything, also summit. Anything local to Hampshire?

[shithotfast]

great thanks.... will give them a ring. website looks good. Anyone used them?

[shithotfast]

another thought.... whats involved in going for an LS3 crate engine - fuel injection ? plus same fitting, mating plate from ultima? ......

Anyone changed from old iron SBC to LS3 ?