I managed to get a 1972 block with 30 thou overbore for £500 in the UK. Although it hadent been pressure tested or checked for cracks, it was a do you want it gamble.... I payed the money and luckely it passed all the tests, its waiting for my replica monocoque chassis to arrive before being built up..... forged crank, h beam rods, 10.5 : 1 compression and aluminium trick flow heads. Linked to a ZF 25/2 transaxle.
I'm aching to get my hands on all those bits and put them on the road.... PM me and i can give you my engine builder..... he also builds 1100BHP blown nitro engines....