OHP Posted August 25, 2019 Share Posted August 25, 2019 Local guy has a 5 Ton Military Mack for sale for not a lot of money. Naive question is what on that huge truck could be retrofitted into a 59 b61? it is a 673 with a turbo. Which would be a big upgrade from my non turbo 711. Thanks, Chris Quote Link to comment https://www.bigmacktrucks.com/topic/58765-5-ton-mack-engine-question/ Share on other sites More sharing options...
j hancock Posted August 26, 2019 Share Posted August 26, 2019 The engine swap "should" be relatively easy. Hard to tell without seeing what it is. Don't think much else would be of value to you. If the army truck is complete and functioning, I would leave it complete and source a replacement engine for your B-61 from something else. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/58765-5-ton-mack-engine-question/#findComment-430860 Share on other sites More sharing options...
glitchwrks Posted August 26, 2019 Share Posted August 26, 2019 Check CraigsList for Albany, there's a cheap 673 sitting in Troy at the moment. Don't remember if it's turbo or NA but I want to say the price was like $150. Quote Link to comment https://www.bigmacktrucks.com/topic/58765-5-ton-mack-engine-question/#findComment-430863 Share on other sites More sharing options...
Hobert62 Posted September 16, 2019 Share Posted September 16, 2019 I’d put the b-61 cab and hood on the 5 ton chassis. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/58765-5-ton-mack-engine-question/#findComment-432222 Share on other sites More sharing options...
Conelrad Posted January 4, 2020 Share Posted January 4, 2020 The mil-spec ENDT-673 was a one-off for the project, fielded from '66-'68 before being replaced with a Hercules Multifuel. Very few 'normal' Mack parts will fit that engine, especially around the bell and water pump/oil cooler/thermostat. It has a two-sump oil pan with special pumps, too. It was known for good mileage, low maintainence, and good longevity. Just expensive. dg 1 Quote Link to comment https://www.bigmacktrucks.com/topic/58765-5-ton-mack-engine-question/#findComment-439394 Share on other sites More sharing options...
Rob Posted January 4, 2020 Share Posted January 4, 2020 (edited) 7 hours ago, Conelrad said: The mil-spec ENDT-673 was a one-off for the project, fielded from '66-'68 before being replaced with a Hercules Multifuel. Very few 'normal' Mack parts will fit that engine, especially around the bell and water pump/oil cooler/thermostat. It has a two-sump oil pan with special pumps, too. It was known for good mileage, low maintainence, and good longevity. Just expensive. dg Yup. I have one on a stand in the shop that is complete. Pulled from a 68 M54A1 several years ago. Edited January 4, 2020 by Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/58765-5-ton-mack-engine-question/#findComment-439402 Share on other sites More sharing options...
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