What camshaft spec for 425 hp

WOW! Good thread hunting. Holy moly!
I can’t answer the question though. I also have not seen Mike in years. He busy doing the right with family life.

Good on him. Here's the car for sale and a complete breakdown of what he had in it.

1973 Plymouth Duster Bracket Racer

Chrysler 360 Engine .030 over
Milodon Oil Pump & Pickup
Federal Mogul H116CP pistons
Lunati Voodoo 234/242 @ .050 .513/.533 lift cam
Crane Roller Rockers
Smith Brothers pushrods

MSD 6A Ignition
MSD Blaster 2 Coil
MSD Distributor
Chrysler iron heads ported by BJR Racing
2.02 Mopar intake valves
1.60 Mopar exhaust valves
around 52cc chambers

Edelbrock Air-Gap Intake
Holley 750HP Carb
Carter High Volume mechanical fuel pump

Moroso Electric Water Pump
Perma-Cool Transmission Cooler
Mr. Gasket 16" Electric Fan

Ran best of 12.21 @ 111 MPH.