One of the guys over on P15-D24.com dndrodshop has a 440 in his 48 Plymouth sedan.

He says "You can put anything in anything. I've been running a 440 RB block in my P15 sedan since 1989. I did move the firewall back a little, upgrade the brakes, change to a rack and pinion, and an 8-3/4 rear end. But I still have stock A-arm suspension.."

"Originally used the stock exhaust manifolds from the '71 New Yorker.

Now have block hugger headers from Sanderson. Ran 2-1/2" exhaust from a "box of bends" while on jack stands in my garage. (Lots of up and downs)

'71 New Yorker Tilt/telo column hooked to a Caviler (GM) rack and pinion. Made my own mounts. gave us a little steering radius but its minor and workable. Used a Rear Sump truck oil pan to allow room for the rack.

Front Shocks relocated. Photos have been posted on this site.

Power disk brakes per my article. see at dndrodshop.com
Set-back the firewall, hung the brakes on the firewall.

Made my own engine mounts and cross member for the trans.

E-body 8-3/4 rear mounted on stock P15 "never been off" springs.

Power windows, shaved door handles, keyless entry (doors & trunk), gas filler in the trunk, v-butt windshield, smoothie front bumper, rolled rear pan with no rear bumper.

Ran the stock radiator (puller fan) for several years until I won a custom radiator at a Goodguys show."