Sco_Aus sent me a pic yesterday of where his engine sits using 200ZR mounts and I reckon that's the way I'll go. Would have been nice to be able to use the standard R33 tail shaft with no modifications as yours looks like a great setup but I need to get the engine very close to the firewall for weight distribution.
I've got a couple of friends that I race against running RB30DET's and they seem to make massive power with minimum effort which is why I'm keen on building one.
The inlet manifold is the main reason I'm leaning towards an RB26 head. If I use an RB25 head I would need to buy an aftermarket forward facing plenum to make it fit and I'd want a bigger throttle body too. So in the end it should work out about the same as buying an Rb26 head which already has the forward facing plenum and ITB's.
Whichever engine I built I would be going forged pistons and rods so the overall cost won't be much different whether I build an RB25 or 30 bottom end.
I'll run the single GT3540R I had on my L28. I was running a .63 exhaust housing on that which was too small. I've just purchased a .82 exhaust housing (thanks Vindicare

) which should be perfect. I plan to run minimum 9:1 compression (maybe more like 9.5:1) on E85. I want about 300-350rwkw without running too much boost or reving it too hard. With the extra capacity, high compression, and lowish boost it should make the power delivery nice and smooth. If it does come on too hard I'll run the boost control through the Haltech and stage it. If it makes strong power from 3500-7000 rpm then that will be a plenty wide enough range.
This setup should also allow me to make much more power in the future if I can get the car setup well enough to use it and if I can afford a drivetrain strong enough to take it.
Good point about the weight. I might do some research into the weight of the bigger block and crank. If there's a big difference then I might consider an RB26 bottom end.
Thanks for all of the info, it's very much appreciated. I'm still getting it all together in my brain and trying to work out what will be the best way to go for what I'm after

I don't want to re-invent the wheel, just copy what people smarter than me have done well
