couple Qs puttin this 69 c10 back together

[lowlyfec10]

So i put a 86+ 350 in the truck and my first question is about the coolant temp sensor. The 69 is a 1/2" thread and the 86 is a 3/8" but a little diff single terminal hookup. Does anyone know if the diff year sensors will read accurate or not with the 69?

Also the ps pump where it mounts to the wp has a gap in the back side and is threaded in the beginning. Previous owner just had a 1.25" long bolt holding it on but im sure the bolt needs to go all the way thru and thread into the bracket. Is there a special bolt for that? And can anyone provide a pic for the mounting bracket where it attaches to the factory exhaust manifold?

Btw im still low on thread posts so i cant post in the classifieds.

Thanks gents....hopefully i can get this thing up n runnin sometime next week.