Questions - 1969 Stepside

[Longhorn Man]

1. Running synthetic is the best thing you can do for the longevity of your engine. Some will argue, but independant labs don't lie. There's a new one comeing out from castroil soon that has high levels of zink, which has been removed from pretty much any oil you'll find oin the market, and is detrimental to the life of the camshaft in your engine.
2 While a 69 is designed for leaded fuel, you can run unleaded without too much damage. Continue with the substitute untill it's no longer sold in your area, then just keep on keeping on. You can fix it at a rebuild, since in all reality, it's never a real good idea to put new heads on a well aged engine.
3. Yes, GMC badges went across the hood on a 69. no, no engine displacement badges on a GMC, Yes, there should be custom script on the top of the doors.