grumpin Posted May 27, 2020 Share Posted May 27, 2020 I've always been curious on this when I see people reference putting plugs in the head holes. Was it all of them except the 460 that were threaded? I was hoping the 460 is threaded. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted May 27, 2020 Share Posted May 27, 2020 I've always been curious on this when I see people reference putting plugs in the head holes. Was it all of them except the 460 that were threaded? I was hoping the 460 is threaded. Nope. They have a C shaped collar and a screw next to it. I'm sure you could find a brass tapered pipe plug and just crank it in. Link to comment Share on other sites More sharing options...
kramttocs Posted May 27, 2020 Share Posted May 27, 2020 I've always been curious on this when I see people reference putting plugs in the head holes. Was it all of them except the 460 that were threaded? I was hoping the 460 is threaded. Jim's correct :( When I get home I can post a picture of what I was going to use for an in-truck solution before I ended up pulling the motor. Link to comment Share on other sites More sharing options...
myrl883 Posted May 27, 2020 Share Posted May 27, 2020 Jim's correct :( When I get home I can post a picture of what I was going to use for an in-truck solution before I ended up pulling the motor. I'm not sure on the 460, I think they're cup plugs - DOZZ-6026-B, I think. The threaded ones are used on small blocks, which looks like what he has. Link to comment Share on other sites More sharing options...
kramttocs Posted May 27, 2020 Share Posted May 27, 2020 I'm not sure on the 460, I think they're cup plugs - DOZZ-6026-B, I think. The threaded ones are used on small blocks, which looks like what he has. No, you were good - his is a 351 and Gary's diagram is applicable. It was my fault for hijacking it with the 460 question. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted May 27, 2020 Share Posted May 27, 2020 No, you were good - his is a 351 and Gary's diagram is applicable. It was my fault for hijacking it with the 460 question. I was asking which p/n myrl was giving. Then replied to Dane. Dane, if you have the heads off or engine out you can get the plugs at NAPA. Link to comment Share on other sites More sharing options...
grumpin Posted May 27, 2020 Share Posted May 27, 2020 I was asking which p/n myrl was giving. Then replied to Dane. Dane, if you have the heads off or engine out you can get the plugs at NAPA. Ok, that’s what I seem to remember, that you couldn’t do it without removing the heads or engine. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted May 27, 2020 Share Posted May 27, 2020 I was asking which p/n myrl was giving. Then replied to Dane. Dane, if you have the heads off or engine out you can get the plugs at NAPA. Ok, that’s what I seem to remember, that you couldn’t do it without removing the heads or engine. Yes The 460 sits so close to the firewall there's no way you could get a punch and hammer back there. But you now know it's just over 5/8 diameter. (.666", the mark of The BEAST) I *think* 3/8 NPT might work? ETA: just checked 3/8 NPTM is .675" at the crests, so it should work. Link to comment Share on other sites More sharing options...
kramttocs Posted May 28, 2020 Share Posted May 28, 2020 Yes The 460 sits so close to the firewall there's no way you could get a punch and hammer back there. But you now know it's just over 5/8 diameter. (.666", the mark of The BEAST) I *think* 3/8 NPT might work? ETA: just checked 3/8 NPTM is .675" at the crests, so it should work. Regarding the 460, here is the factory hold down clip: It's offset due to the retaining ring on the crossover tube. Here is what I made before I pulled the 460 in the 86 and plugged it with the plug. Nothing groundbreaking but it works and isn't terrible to install all things considered. I installed some on my 85 1 ton and never had any leaking. On these I welded on washers to ensure the plate was over the hole and didn't twist when tightening down as I ran into that on the 85 and smeared the gasket maker. Link to comment Share on other sites More sharing options...
grumpin Posted May 28, 2020 Share Posted May 28, 2020 Regarding the 460, here is the factory hold down clip: It's offset due to the retaining ring on the crossover tube. Here is what I made before I pulled the 460 in the 86 and plugged it with the plug. Nothing groundbreaking but it works and isn't terrible to install all things considered. I installed some on my 85 1 ton and never had any leaking. On these I welded on washers to ensure the plate was over the hole and didn't twist when tightening down as I ran into that on the 85 and smeared the gasket maker. That’s nice Scott, good job! I have a friend who could make me a couple of those if need be. Link to comment Share on other sites More sharing options...
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