hi,now got to the stage where i'm gonna mount or have a go @ mounting my engine weekend what height should the sprocket adaptor centre line be at?and what is the maximum angle the first prop can be at cheers wayno!!!
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Your title gave me a sudden mental image of what you were trying to achieve -

It's up to you! Just remember that you connot have angles more that something like +/-7degrees on any one UJ. Plus, you need to have some misalignment so that you do have some movement in the UJ's as they rotate, otherwise you run the risk of wearing a flat in the UJ bearing as it's always the same point that sees the load!

Also, bear in mind sump height - I would allow as much ground clearance as you can....

Although with a blackbird engine if you're going for track days you shouldn't have a sump clearance problem because the dry sump is very thin

I've got a spare MK Blackbird Cradle, yours for £50

Cheers

Ian