The bloke who drives it is an experianced driver with a lot of years on an "Atkinson" Cummins 350 HP, and before that on "Inters". I think he would keep it spinning nicely but not over reving. We got the engine out and pulled right down, it was surposed to have been overhauled not long before they bought it, but looking at it it may have only been an in chassis rebuild. It has run the number 4 main bearing and that may (?) be what caused the number 4 & 8 big ends to give out. The rest of the engine is in real good order and no visible cracks in either block or heads but we will get them checked anyway. The mains look like they havn't been disturbed and are a lot more worn than the big ends. The pots and pistons have definatly been replaced, but you could do that without removing the crank. The main reason I asked about their reliability is out here the V8 doesn't have the same reputation as the Mack six cylinder, and we were wondering if they are well thought of stateside ? Anyway I will let you all know how it turns out. Graham