1988 R model Posted April 12, 2020 Share Posted April 12, 2020 Hi I have a 1965 b30 with the flat head gas I was wondering if anyway here has any advice on how to swap a 237 with a 5 speed I would like to know if there’s any major issues or fabrication that will have to be done. Thank you Quote Link to comment https://www.bigmacktrucks.com/topic/62026-b30-237-swap/ Share on other sites More sharing options...
mattb73lt Posted April 13, 2020 Share Posted April 13, 2020 I did this a while back with a '63 B-42. I used a B-61SX as a donor truck. The frame on the B-42 was pre-drilled to accept gas or diesel cross members and transmission mounts, so both will bolt right in. I would think that the B-30 frame would be pre-drilled as well, although it is a much lighter truck. The springs may be an issue up front with the added weight of the eng & trans. Having a donor would really help for all the bits and pieces you'll need to hook everything up. I have a 237 in mine now, hooked to a triplex. Started with a END-673. The five speed might take the same mounts, but I'm not sure. The engine will fit and you'll need the bigger B-61 radiator to cool it. It will handle the 237. Somebody, here, may have done this to a B-30 and have more info on the pros and cons of that particular model. It can be done, though. Quote Link to comment https://www.bigmacktrucks.com/topic/62026-b30-237-swap/#findComment-448584 Share on other sites More sharing options...
1988 R model Posted April 13, 2020 Author Share Posted April 13, 2020 Thank you and Yea I was gonna get a doner truck cause all the little bits and pieces I’ll need Quote Link to comment https://www.bigmacktrucks.com/topic/62026-b30-237-swap/#findComment-448586 Share on other sites More sharing options...
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