Re: 478M swap
I am pretty sure I recall a thread many years ago to the effect that you needed to use the 305 timing cover.
It seems to me there was some issue with the vertical position of the water pump also, relative to the radiator in the smaller chassis. Maybe there was a different water pump setup??
I am really digging back in old memory for that, so do not put a lot of credence in my memory.
Somebody else will likely chime in.
Fun projects....mostly only take time and money!
Rod Johnson
Issaquah
1970 RM7500 (school bus chassis -motor home)
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