b61fred Posted October 30, 2017 Share Posted October 30, 2017 I'be got my self in a project that I know little about. Someone else has removed the 431 gas engine and trans from this truck. The engine is pretty much junk. Add in the fact parts are almost non-existent for this engine. Has anyone here had any luck installing a "B" model 673? Quote 15 gears...no waiting! Link to comment https://www.bigmacktrucks.com/topic/51551-673-diesel-in-an-a50-truck/ Share on other sites More sharing options...
j hancock Posted October 30, 2017 Share Posted October 30, 2017 No real details but here is one that is done. https://www.hagerty.com/articles-videos/articles/2017/02/20/mack-truck 1 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/51551-673-diesel-in-an-a50-truck/#findComment-383887 Share on other sites More sharing options...
b61fred Posted October 31, 2017 Author Share Posted October 31, 2017 Thanks for the article. I think the 673 is pretty close to the original engine in size. I guess I will have to get the tape measure out and get started. 1 Quote 15 gears...no waiting! Link to comment https://www.bigmacktrucks.com/topic/51551-673-diesel-in-an-a50-truck/#findComment-383931 Share on other sites More sharing options...
thomastractorsvc Posted November 23, 2017 Share Posted November 23, 2017 On 10/31/2017 at 5:01 AM, b61fred said: Thanks for the article. I think the 673 is pretty close to the original engine in size. I guess I will have to get the tape measure out and get started. what did you find out? Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/51551-673-diesel-in-an-a50-truck/#findComment-385715 Share on other sites More sharing options...
b61fred Posted December 16, 2017 Author Share Posted December 16, 2017 Sorry for the late reply. The engine is about 6 inch longer than the gasser. Other than that its pretty close. I also found the 673 from a b is very close to the steering box. There would be no way to install a R model engine unless the oil filters were remove mounted. The A 50 frame is about 6 inches narrower than the B frame. Morgan Quote 15 gears...no waiting! Link to comment https://www.bigmacktrucks.com/topic/51551-673-diesel-in-an-a50-truck/#findComment-387567 Share on other sites More sharing options...
Maddog13407 Posted December 16, 2017 Share Posted December 16, 2017 slide a little 12 valve Cummins in there. always wanted a little A model with a Cummins 2 Quote Link to comment https://www.bigmacktrucks.com/topic/51551-673-diesel-in-an-a50-truck/#findComment-387568 Share on other sites More sharing options...
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