Just wondering if there is a correct measurement between the top of the front bump stop and subframe. That is apart from measuring from the middle of the wheel to the top of the guard.

My understanding is the ride height at the front should be enough to keep the drive shafts as close as you can, to parallel to the ground; about 3 fingers between tyre and wheel arch.
This will leave a small gap between the rubber bumpstop and the the subframe. If the bumpstop is taking the weight of the car, the suspension cannot do its job.

Could never see the point of competition bumpstops at the front as they sit the suspension so high it's only suitable for rallying.

I set mine up with about 1/2 lnch minimum between the bumpstop and the subframe ,

Mark

Any more input would be helpful.

What other info do you need?

Ride height and hydraulic pressure are the only measurements given. When these measurements are followed there should be plenty of bump stop clearance.

I set mine 3 fingers from tyre to guard.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.