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 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 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 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 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 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 Share on other sites More sharing options...
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