CRittaler Posted February 17, 2022 Author Share Posted February 17, 2022 Nice project I love it I dont remember what is different between a 250 and the 292 six as it have been way to many years since I messed with them. Do you know the make of the AXU. trans? I take it is low / direct / high? Dave ---- Thanks! I saw it and just had to have it! I don't think I overspent at $2200 considering I could drive it home. It has a lot of body rust in the door bottoms and cab corners, but there are a LOT of aftermarket patch panels for this era thankfully. Fenders might be tricky since it's a medium duty truck so they're a bit different. I know the block is different between the 250 and the 292 because the 292 has larger push rod covers on the side and the 292 has a different passenger side motor mount. The 230 and 250 are the same from the outside, but the pistons are different. I had to put a borescope down a spark plug to confirm it's a 250 because it has the characteristic D shaped recess in the piston top. I'm not sure what the aux trans is yet, I thought it was a 2 speed when I bought it, I discovered the 3rd gear when I got it home lol. I'm assuming it's a Under, Direct, Over and as best I can tell it's a Watson Model 31, but I haven't confirmed it yet. What I'm not looking forward to is finding brake parts. It has a remote mount vacuum booster under the driver side floor and as best I can tell rear drum brake parts are unobtanium. Even tires are hard to find since they're an odd 9R22.5 size. Wheels are rare, only offered on a couple years and modern 10 bolt wheels are a different bolt circle so it could be interesting. Link to comment Share on other sites More sharing options...
CRittaler Posted February 23, 2023 Author Share Posted February 23, 2023 Nice project I love it I dont remember what is different between a 250 and the 292 six as it have been way to many years since I messed with them. Do you know the make of the AXU. trans? I take it is low / direct / high? Dave ---- Thanks! I saw it and just had to have it! I don't think I overspent at $2200 considering I could drive it home. It has a lot of body rust in the door bottoms and cab corners, but there are a LOT of aftermarket patch panels for this era thankfully. Fenders might be tricky since it's a medium duty truck so they're a bit different. I know the block is different between the 250 and the 292 because the 292 has larger push rod covers on the side and the 292 has a different passenger side motor mount. The 230 and 250 are the same from the outside, but the pistons are different. I had to put a borescope down a spark plug to confirm it's a 250 because it has the characteristic D shaped recess in the piston top. I'm not sure what the aux trans is yet, I thought it was a 2 speed when I bought it, I discovered the 3rd gear when I got it home lol. I'm assuming it's a Under, Direct, Over and as best I can tell it's a Watson Model 31, but I haven't confirmed it yet. What I'm not looking forward to is finding brake parts. It has a remote mount vacuum booster under the driver side floor and as best I can tell rear drum brake parts are unobtanium. Even tires are hard to find since they're an odd 9R22.5 size. Wheels are rare, only offered on a couple years and modern 10 bolt wheels are a different bolt circle so it could be interesting. I haven't done much with this project in a while, but I thought I'd post up here that I snagged another SM420 off Facebook Marketplace. They claimed it was rebuilt and they changed directions on their project before they could install it. All of the gaskets are new. I pulled the PTO cover and had a look inside. It's surprisingly clean. Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 23, 2023 Share Posted February 23, 2023 I haven't done much with this project in a while, but I thought I'd post up here that I snagged another SM420 off Facebook Marketplace. They claimed it was rebuilt and they changed directions on their project before they could install it. All of the gaskets are new. I pulled the PTO cover and had a look inside. It's surprisingly clean. Cool! It looks like it is in great condition. Link to comment Share on other sites More sharing options...
BigBrother-84 Posted February 23, 2023 Share Posted February 23, 2023 Wow! Didn't see your thread in September! Nice project! But, OMG!! There is almost nothing under this huge and big hood ! https://forum.garysgaragemahal.com/file/n104367/IMG_20210902_200131_993.jpg https://forum.garysgaragemahal.com/file/n104367/IMG_20210902_200131_996.jpg Link to comment Share on other sites More sharing options...
CRittaler Posted February 23, 2023 Author Share Posted February 23, 2023 Wow! Didn't see your thread in September! Nice project! But, OMG!! There is almost nothing under this huge and big hood ! https://forum.garysgaragemahal.com/file/n104367/IMG_20210902_200131_993.jpg https://forum.garysgaragemahal.com/file/n104367/IMG_20210902_200131_996.jpg I know! The 250 looks tiny. The factory motor on this truck was a 235 Link to comment Share on other sites More sharing options...
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