[Madmiles442]

Ditto Rich with Classic Transport. Did a great job and loves these cars, so he'll take care of your baby.
LuvDaBlues (Steve) is a friend who recently bought an SPF with a 460. I think if he had to do it over again, he'd go with the 427. PM me and I'll give you his cell for more details.
The 460 is a truck motor, larger block, more torque, but can be stroked to get it up in HP. The 460 absolutely fills the engine bay. I mean it's stuffed. To change the spark plugs, you have to unhook the motor mounts and raise the engine.
Also the 460 will have a more limited resale customer base. Someday, somewhere, you'll probably sell it. When you win the lottery and want a CSX or when the wife comes home and announces "We're having twins!" The 460 will appeal to less folks.
Hey, Chris, you will love this car and it will love you back. You'll be happy as snot and go through the rest of your life with a grin on your face.
Just scattershooting while thinking about different big blocks....