MCU choices

[YOU LOOK LIKE A MILLION BUCKS - ALL GREEN & WRINKLY.]

Hi all, I just subscribed to the list, so forgive me if this has been discussed
before.  I plan to design and build an EFI system for my '56 Chevy 
Pickup and I am wondering which Motorola microcontroller would be my best
choice.  I have a lot of experience with the HC11, but I have not used the 
68HC16 and 6833X devices, which look quite useful.