Rb20det Metal Headgasket

[Rancher]

Okie dokie. I have an RB20DET that I'm building. Ive already got most of the goodies in and together.

I came to ordering my headgasket. (Stuff Autobarn, they want $500 for the same one I can buy off Slide for $250) Its a Cometic (Not a Tomie) one. Not sure of the width. But the bore on it is 80MM. Now the bore on the RB20DET is 78MM... Is this ok?

Also. While I'm at it. I'm also looking at buying new cams. Not regrinding the stock ones. I want something thats not gonna make it a pig to drive. But I want something thats gonna be a decent upgrade in power. Something that brings boost on hard and fast. So anyone with cam's knowledge would be good to hear from. Or somewhere I can read about myself and get an idea.

Thanks fella's.