I thought I could thread these but I’ve got the wrong tap. Can someone give me the size of these freeze plugs? Either for tapping or freeze plug replacement

Hey Rob and all, would love some of your expert advice tuning my pickup! Goal: enough power to haul a trailer full of cows down the highway at 75, with enough manners to not black anyone out getting there. Usable low end power is what I’m after, and I have the opposite 😅 l've had it for over ten years and fired every shot of the parts cannon I can find and I'm still not there. It's got plenty of top end power, but the low end is absolutely atrocious and no matter what I do I can't get rid of the smoke. Turbos don't spool until roughly 1800 rpm and anything under that is a luggy mess. Once I hit 2k it drives pretty good, but it's pain to keep it that high around town or pulling a trailer. Max boost is 45ish at WOT, but I never get there in normal driving. 25-30 is the most it usually sees. Mods: DPS stage 1 compounds. 362/475. THD 6 x 11.5 injectors Hamilton towing cam Head studs/valve springs/pushrods HVLP lift pump M&H Timing spacer Ratman DV’s Ratman fuel pin 3200 rpm spring NV4500 Water/meth but not really using it Pump settings: Smoke screw: all the way backed out. Starwheel: almost all the way backed out. Power screw: 7 full threads showing. Recently backed it out 2 full turns to help smoke. Definitely lost some top end though. Timing: somewhere in the middle, hopefully around stock but there’s multiple marks so unsure exactly. I have adjusted the timing to every 1/8” from the head the slots allow and it never gets noticeably better than where it’s at. What I’d like to do: figure out how to run smaller compounds like a k27/369 but not sure my budget and fab skills will cooperate. Other ideas include figuring out how to make an s300g work as the manifold charger. Also does it need different injectors because people say Eric’s just run dirty? What would you do? Anyway, all the advice is much appreciated, and I’d also be interested in buying a smaller compound kit or piping that would work if anyone has stuff they’ve made! Thanks!

Thanks for the link to the group.! Hey Rob i got a Ve swap 98% done. How how do I time and pump tune this prick? Last I knew 1 tooth ahead of (C). Injectors popped to 3550psi. Please help a guy Im a stunned mouth breathin mongoloid. Im missing something! Plz be nice fellers and fellets. Ive been beating myself up enough @Michael Marks

Curious on everyone's thoughts on the timing spacer has anyone used it and noticed a difference, in theory it seems like a good upgrade. Considering ordering one and trying it out.

I’ve got a 1992 12v Cummins manual 4x4 that’s making a strange noise. Things done to it and kdp, 2 gen lift pump, 3200 rpm spring, slight timing bump. I first noticed the noise after doing my head gasket and valve seals. I’m not positive that it’s a new noise or I just noticed it because I just did the head gasket. Things I’ve checked are reset the valve lash three times, pulled push rods out to check there straight, crack one injector at a time to see if the noise leaves, run it with the belt off. Nothing seams to help. The weird thing is the noise is not there when I first fire it up in the morning but comes back after a minute or two of running. Motor seems to run fine and has little to no blow by. Any help would be much appreciated thanks