I use a 1970 440 6 pack base with a six pack lid on a 440 six pack motor installed in a 1969 air grabber 383 car. It all works together and looks very factory. Most neophytes don't even know it's a six pack when they look at it. Even left the 383 emblems to complete the sleeper effect.

BTW if you have any real HP behind your motor I would suggest using a torque strap of some kind. If you bust a motor mount without it you will rip up some very expensive air grabber ducting.