Yes, it is 418 cubic inch, but close enough with a 2.02 valve to your 408 example with the tighter lsa.
I knew i would be forgetting something on the specs.,
I have the hooker ceramic coated 1 5/8" headers for exhaust connected to 2 1/2" duel exhaust with walker.
The weak link is the intake and carburetor. I am using the straight performer intake because it allows the use of the center mounted ac compressor due it its offset gooseneck. I gasket matched it maybe a 1/2" just so there wouldn't be such a large port mismatch between the trick flow ports and the manifold. I would like to swap out to the rpm air gap as soon as I can figure out the bracketry for it that will allow me to keep my ac, as you know, a necessity in Florida.
I do have a holly 750 vacuum second carburetor for it, but I have been using a summit 650 carburetor with the annular boosters. It hasn't been running long enough to swap and compare, but i thought the boosters might make it more responsive and get better fuel economy on long trip north.