not sure why it would have cracked , but I’ll get the head checked when I pull it off .Make sure the head is not cracked, not common but rule it out....
They’re 7mm , 9745 is the part number on the tip. I measured them.One question you need to think on. What size are your injector tips? Old heads has 9mm injector tips and those were known to crack. Cummins changed injector tips to 7mm in the early '90's and the problem went away. As far as I know, all new heads are 7mm but if your injectors are 9mm they aren't going to fit. You'll either have to change your tips to 7mm or get new injectors. Cummins doesn't even sell 9mm injectors anymore. They provide 7mm units and a 2mm sleeve to make them fit.
Doin that now 👍You will have to have the rocker pedestals machined to use the studs. Not a big deal.
I was hoping running it non IC with the super 30 would actually lower EGTs.. since it’s not getting 180* air from the coolantNeed to save up for that intercooler real quick. At any kind of serious boost level your intake temp is going to be in the 300-400 deg F range. EGT's will range higher than normal too.