GIBBS Driven Hot Rod
Oil,
Amsoil Z-Rod
oil. The formulas are good for what we use our cars for. If you just race, go with racing
oil version of Gibbs Driven or Brad Penn. There or others that are good, Redline, Lucas, Valvoline VR1 ect. You'll rightfully get alot of answers but this is what I use. Viscosity depends on clearances in the engine, conditions you drive in, I usually get the lightest oil that gives m the pressure I need. I like my oil to flow through the bearing not get backed up.
Synthetic, Dino or a blend, whew this is getting to complicated Lol. I've tried them all, right now I'm using
Amsoil Z-Rod 10w-30
synthetic, so far I like it. I have an old style 351w 1979 block and all is well.