@Wyrmrider ......the EQ CH318A/B heads are the best compromise for strength, price and performance....I'm going to use a properly clearanced set on my nitrous 318 Magnum engine with the goal of drowning a stock style bottom end with tons of juice before I do my turbo combo.
Look up ZDDP MAX, that'll help with that end. I use Schaeffers Supreme 9000 motor oil in everything I have, change every 6000k. Not cheap, but really good
Alright, I'd go with applying some modern engine techniques and management to either small block.
To me, improving combustion efficiency and reducing detonation sensitivity is job one for mpg, so I'd use whatever heads with the best combustion chamber, tighten up the piston to head clearances (...
There are too many things involved to make the right cam choice, but I will say this......I would rather have a custom ground cam that is perfect for what I want the vehicle to do and pay the extra money for it.
Going the extra mile to set goals, doing the math from front to back on a...