Small Block Chevy for S/G

[Jason Oldfield]

Originally Posted by luckydog

So what kind of SBC aluminum heads would you guys recommend if building a new 400+? 18 or 23 if starting new?

Damien, if you're starting from scratch, 18 degrees all the way. The power gains are appreciable for essentially no extra cost.

But, if you're re-doing your motor, you'd need new pistons, new headers (or header modifications), new valvetrain among other things, which makes a "simple head change" a little more complex and expensive.