Let first engine I had built buy a guy that does the builds for Genetta. Time wasn't really an issue, so the fact it took a couple of months wasn't an issue. At the minute I'm talking to Ian @ clockwisemotion as it look like I have a crack in my block. As he is well respected it's generally thought that he is really expensive, but I thought it was quite reasonable. As a rough idea, if I was to take my block to him he would disassemble it, replace my block core, and then rebuild using my crank and rods, but with new oversized forged pistons, and all new components shells etc. He would rebuild using my new oil pump and any other bits I have. It would also include a being fully rotationallly balanced and tested. So basically a fully rebuild bottom end ready to put my head on. That would cost approx £1800(+vat) inc all parts and labour. Sounds a lot, but I'd get back a product that I KNOW has been built with meticulous attention, and is good for 350bhp.