I used sunpro gauges for coolant, oil and voltage here, and there is another vacuum gauge (for diesel vacuum pump) I got from fleabay (not shown here)
And I am also running a boost and an egt gauge here, 2" (not shown) The boost gauge is Sunpro and the EGT gauge is another fleabay special. I really need to get new pics of these.
The oil and coolant temp gauges came with adaptors, on the stock carb intake there is a fitting that uses NPT, should bolt right in easy, for my diesel intake I had to tap a pre-existing hole to be larger. EFI heads should have the same access point that the carb heads do, it is a square plug that can be removed with a (I think) 13mm box wrench. Oil pressure gauge there should be a 2nd point on the block near the oil dipstick tube you can tap into. For my diesel setup (turbo) I had to implement a tee for my gauge at the stock oil pressure sensor (as I needed the extra port for the turbo.)
Your stock block should look **similar** to this here:
P.S. I found a video showing my vacuum gauge working. I'm not trying to show off how it works, I just want to show you how it looks when lit up.