RAMM wanted to know about this 451..............
I was running a 440 in my 70 Charger putting out a little over 500 hp. It was built by a friend (lives down the road from IQ now coincidently) using home ported 906s, stock 440 block and rotating assembly, solid roller a 6 pack and headers.
It was all in the tune , port work and choice of cam specs.. Kevin was a small town mechanic that had a really good head for motors.
He drove that motor daily while in his 70 6 pack Challenger and I drove it daily while in my Charger.
My point is that there it doesnt take an R&D dept to attain high horse power.... It takes understanding of the whole package and the ability to visualize the process.
Sadley I dont have either..... Just enough to get myself in trouble... Lol