With the cost of YB 200 and 500 blocks seeming to be over £2k / £2500 it seems to me that the alloy blocks at £3500 plus VAT make a lot of sense when you can run 2.4. (especially as my 200 block and pistons / rods would have a value)

I guess with both builds you would be in for pistons and rods either way. Do the alloy blocks run just standard cranks, if so you might find there are savings although I suppose you might be daft not to run an arrow etc.

I have seen that the std head will fit the alloy blocks, I dont think I would run to the £6500 head at the moment So you would need the cams and head sorting.

I guess this would be a good 500 - 600 bhp option with the right size EFR? I would be limited to the 7670 I think as the next one up would take up too much room in my bay but at least I could re-use the manifold that Mark Shead had made and he thought my current turbo wouldnt have enough puff for a long stroke over 500bhp.

I am actually not chasing numbers as the 469bhp and 500 lbft that my car has is more than enough, I am just thinking about the potential rebuild of my engine and where best to spend the money, If I can get away with a refresh, long studs and cams / headwork then I would be happy.

Any thoughts?