Post your diagrams and what not

I'll print the engine weight specifications if you need them.

Just a reference,

1967 Plymouth Barracuda 'Fastback' with a 273 Commando #2940 lbs.
1967 Plymouth Barracuda 'Fastback' with a 383 Big-Block #3202 lbs.

According to Mopar, the Big-Block Engine and Transmission added #176 lbs.
over the nose, with an additional #86 lbs. added in components.