Aren't these big numbers for a stocker?

[Curiousyellow71]

I don't think there is any difference between a 77 engine once you remove the exhaust manifold for the application and the lean burn crap.
If you do decent on your port work...imo your 350hp is low. At any rate... going to be more fun then your old 318.

 

[mopar 3 B]

Your 77 Pace Arrow 440 could be of any year. Motor Homes are modeled per year of the units manufacture.
I have a 77 Excel class C titled as a 77 sitting on a 76 Dodge chassis. So if you want to know what year the 440 in your Pace Arrow is check the block.

 

[Dan64]

I've heard but would like to confirm that "motor home block " have a full length rib that runs down the side of the block as compared to a regular block that the rib runs about half the length of the block. Any truth to this?.

 

[Darter6]

Plus they have a different head that has what is called "steam holes" If I remember.

 

[wyrmrider]

and they have better valves