Project engine number 3

[Ruan]

I'll reply properly later when I'm not stuck in a 5 mile queue... With regards to head studs, basically its a bit of a.nightmare, ARP ones do fit, but need extended washers, you cannot use any old material, they need to be high tensile and heat treated or you'll crush them.... To have some made, they must be rolled threads which poses problems as M12x1.25 isn't the most common thread to have a die of, so most fastner places will say they'll cost a fortune... Though I seriously doubt a t25 will have lifted the head, its extreme torque that does it and knowing how t25s are, they'll ne er make the low down torque of a VNT or a modern GT series...