Engine is being built at the moment, had this email from the builder, We have checked the main tunnels in the falcon block and found them to be .0005 thou above the top limit on the STD block specification. With the crankshaft within spec but on the minimum size we are ending up with .0035 -.004 thou main bearing clearance. I am able to correct the main tunnel size in the block.However on its own we will still end up with too much clearance. The solution is to use a plus .001 bearing which is available in Australia and would be here by friday. Would you like me to order them ? Also we have had to resize the new conrods due to distortion and size when torqued up with the correct ARP bolt lube. 2 conrods were almost acceptable, 2 rods were undersize and 2 were oversize by up to .00075 Thou. Tuner reckons if I hadn't melted a couple of pistons the engine would have spun a bearing sooner rather than later! Why can't everything just bolt up! This car is fighting me all the way.