cummins bc vs. cat

Ok I know this is more than likely going to come down to personal preferance. But how do the big cams compaire to the 3406 as far as common issues and common repairs feom my understandings the bc is a low flow coolant and can run in to temp issues if they are turned up. I have very little time with them. I ran one cat that was from late 80s that was turnes up a good bit. What kind ofmileage can they do? I am looking at buying a 359 379. One I called on dontknow the gear ratio but had a 15sp bc 3 400 don't know what hp really was or any pump work but was told they only got 5mpg with tall rubber running hopper.

That normal?

 

Ok I'm going to be in a a or b model all mechanical...

 

What years were they made do you know off had? If I buy a 379 its gonna have a screamin d 60s or a kitty in it... don't know why but cummins just don't catch my eye

 

Thanks Corey. why do people say thet have say a big cam 400 when its not a 400horse motor same with cat I hear " oh I got a 425b modle cat" and its not at 425.... I found another thing on here but that was more the n15 c15-16

I want a motor with as little electric items on it so I can do all the work on my own. I've hear that the older motors can't make the tq the new ones can. I don't need so much power I blow the leaves off the trees as I pass by... just want somthing that will hand hills good and its not like your pulling the hill in a stock pickup... if you know what I mean

 

What has to be done to make power with a bc and have some what decent fuel. I'm personally more a 3406 guy dad had a l9000 ford dump truck that cranked right along... fist day he put it to work we were load pulling a decebt sized hill he was all smiles and said "she's got way more power than the old truck" don't know what his old truck had for a motor can he was company at that time then went solo with this one. I'm looking at trucks to run a semi local flat bed. Lot of lumber and steel at some points maybe even some hopper bottom.

I'd like to have a 48in flat top...

Thanks for the help. Are the older motors fussy about whar rpm your running going down the road? I've heard the c15 is picky about this when it comes to mpg.