I had one built years ago. Kind of wish I hadn't. Maybe it was the builder I used (who wanted to do things his way instead of how I wanted them done) but to me, it is too darn difficult to mount anything.
Starter solenoid and voltage regulator are now on the fire wall, and wires have to be lengthened. I have an aftermarket headlight harness I'd like to install, but there's no more core support to mount the relays to. So, again, I'm lengthening wires - this time on a brand new, well built harness. It still concerns me that someday I'm going to run over a rock or something that's going to get thrown up into my fiberglass hood and damage it. Driving in the rain concerns me for spraying water up into the engine and distributor.
Had I thought it out more before I had it done, I would have just repaired the damaged inner assembly and left it stock. Like you, I had rusty and damaged inner fenders, kick panels, and core support, so it made sense to remove everything and start from scratch.
Had I used a different builder, I might not be as frustrated as I am though.
