blegh Posted August 20, 2006 Share Posted August 20, 2006 Does anyone know if an NTC cummins block will drop-in to an old mack. It is a B735 with an NH 220 hp Cummins inher now. I think all these blocks were the 855 c.i. block so I thought it might be an easy re-power without moving the firewall. Any info would be appreciated.barry Quote Link to comment https://www.bigmacktrucks.com/topic/1441-cummins-drop-in/ Share on other sites More sharing options...
HK Trucking Posted August 20, 2006 Share Posted August 20, 2006 All the big block Cummins motors-H,NH,NTC,NTA are the same size externally, and will fit, may be some minor differences in accessories, that's all. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/1441-cummins-drop-in/#findComment-7142 Share on other sites More sharing options...
blegh Posted August 20, 2006 Author Share Posted August 20, 2006 All the big block Cummins motors-H,NH,NTC,NTA are the same size externally, and will fit, may be some minor differences in accessories, that's all.Thanks for the help. While you are thinking about it, do you think a TRT trans and camel back rears would stand up to 400 hp. In the old days they always said the camelbacks were indestructible - but they hadn't seen 400+ hp in those days either. I have driven a quad box with NTC 335 hp, so I know the drive line will take that much. Thanks againbarry Quote Link to comment https://www.bigmacktrucks.com/topic/1441-cummins-drop-in/#findComment-7155 Share on other sites More sharing options...
Joe Cummings Posted September 9, 2006 Share Posted September 9, 2006 The rears will stand up no problem. The TRT is only rated about 700 foot pounds. Quote Link to comment https://www.bigmacktrucks.com/topic/1441-cummins-drop-in/#findComment-7455 Share on other sites More sharing options...
fullfuel01 Posted September 9, 2006 Share Posted September 9, 2006 can have some of these with 350. a turn-up 350 is better then a 400 cummins Quote Link to comment https://www.bigmacktrucks.com/topic/1441-cummins-drop-in/#findComment-7458 Share on other sites More sharing options...
Joe Cummings Posted September 10, 2006 Share Posted September 10, 2006 I was thinking for an antique truck, if the 220 is in good shape, why not just change the button? Probably get it to pump out 300HP without a problem. A button only costs about 10 bucks. Quote Link to comment https://www.bigmacktrucks.com/topic/1441-cummins-drop-in/#findComment-7469 Share on other sites More sharing options...
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