Found this 383, worth it for my 65?

My 1965 B-Cuda had a HP 383 when I bought it in 1986. It was nose heavy and the steering shaft was into the left ex manifold and would lock the steering when torqued up. Could not afford "Stan's" headers so had to work with 383 logs.

Changing spark plugs was HARD, remove the left motor mount and jack the engine up. Right side was a little better. Had to use a MODIFIED 13/16's box end wrench on most plugs.

Small engine compartment meant no air flow out so even using a bigger radiator, DC P part 5 blade clutch fan, Water Wetter, and every trick at the time it over heated.

It was fast in a straight line but had to slow way down to corner.

Big Block 727 bellhousing hit the firewall and required a massive bashing in the floor. Even then it was tight.

After 15 years fighting this, yanked the 383 and put in in my Pickup, NEVER over heated even pulling a heavy trailer.... Got a 360 and built it. B-Cuda was now faster and could corner too.

So, my opinion having been there, looking for 425 HP, I'd do a 5.9/360 hybrid stroker. The chassis was made for the Slant 6 and a 273.
Put 10 each 273 long block's next to 10 each 5.9 long block's (no manifolds or valve covers) and back off 20 feet, any Chevy guy will never guess which is which.