John: You're more than welcome. It's not a big deal to go out to the shop and measure stuff, especially when the car has been up on jack stands since March. Keep asking questions - I finished mine (well, it's never quite finished, is it?) in 2000 after working on it for seven years so helping others like you is simply payback.
Haven't gotten into Warwickshire all that much - one trip to Birmingham to visit a data center and shake hands with a bunch of VP's and that was about it. Flew out that evening to Cork, Ireland, where my company center was, although I've been retired since 2001.
Here in Grafton, Massachusetts, we're close to Leicester (where my daughter lives), Worcester, Shrewsbury, North and South Hampton - all those places that seem like home to you. We even pronounce them correctly!!
Keep us in the info loop as your build progresses. We all can help a lot and we're a very large (and international) group of everything from gas-only owners to complete builders.
Someday, I swear I'm gonna get over to the Isles again, just to visit a bunch of Speedstah guys in England, Scotland and Ireland - maybe do the Goodwood show and all that!
All the best, gn
BTW: Currently 32 degrees C and heavy rain in Grafton at 7:41 pm. Seems more like Brittany than "New England"!