Year Differences Between The Early & Late MEL 430s

I've been tossing around the idea of using an early (pre 60-61) MEL 430 for my drag project. I have a '65 now, and I have a matching set of Isky 1.5:1 rockers and roller cam for it. Also have the card. My question is, what are the differences between the years of the 430s?

The bellhousing pattern has been well-covered (biggest reason why I want to run the early block...toploader), and I understand the sizes on the cam journals are a little different, but are there any other significant reasons why I shouldn't go for it? ***ume I can get a cam ground to the Isky profile with the proper-sized journals for an early block.

Thanks,
Brian

 

Hit up beep! He knows alot about them hes been running them since they were new.they are different from year to year.