darkkar Posted June 21, 2017 Share Posted June 21, 2017 I got a 1957 b 61 with a 673 tubro with a 5 and 3 trans. I got a r model with a 237 5 spd that i want to put in the b 61. Will it fit if so what do i have to change motor mounts fan water pump pullys ect. What will i need to do or change. Thanks Ed Quote Link to comment https://www.bigmacktrucks.com/topic/50245-673-to-a-237-swap-need-help/ Share on other sites More sharing options...
Hobert62 Posted June 21, 2017 Share Posted June 21, 2017 Somewhere on here a member "freight train" has a really detailed post of what he went through when he did his conversion. His was a 673 non turbo to start. Quote Link to comment https://www.bigmacktrucks.com/topic/50245-673-to-a-237-swap-need-help/#findComment-372881 Share on other sites More sharing options...
Freightrain Posted June 21, 2017 Share Posted June 21, 2017 It is a basic bolt in. You will need to use the balancer and water pump off the 673. The 237 stuff is too long and would run into the radiator. I reused my front mount only because the 237 was missing. I would suppose it is the same anyway? Are you using the 5spd too? You will need to do something with the clutch as that is likely a pull style and the B is push. I'm still running my Triplex and have no issues. I had to build my own air intake. Was pretty simple using some 3 1/2" and 4" tubing and some silicone couplers. 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/50245-673-to-a-237-swap-need-help/#findComment-372917 Share on other sites More sharing options...
darkkar Posted June 22, 2017 Author Share Posted June 22, 2017 Thank you for the help. You done a nice job on yours i like it. Quote Link to comment https://www.bigmacktrucks.com/topic/50245-673-to-a-237-swap-need-help/#findComment-373008 Share on other sites More sharing options...
Freightrain Posted June 22, 2017 Share Posted June 22, 2017 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/50245-673-to-a-237-swap-need-help/#findComment-373049 Share on other sites More sharing options...
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