Good work John.
If, with me, we end up with nothing else from these projects we will have greater admiration for industrial designers, particularly automotive design engineers.
I can only reiterate from my very hard earned experience, but keep an eye on the complete assembly, including ancillaries. I'm now trying to plumb heater hoses and it is proving harder than an engine install.
On the point of a 'complete assembly', how is the clearance for the exhaust with the new frame rail running down the firewall?