Hi Dan. I just took the sierra prop and 200 prop to an engineering place near me and they knocked It up. It looks like ur engine is a little further fwd so u may need to fit a longer spacer. Still cheaper than £260 for a custom prop!!!!
I take it the car is IRS with a LSD
I'm also going to mount the air filter outside the body. It gets way to hot under there to be sucking in air!