This is a nice easy one - think it might have been my first IC-based guitar pedal builds.  

The Earthquaker Devices Acapulco Gold is quite the beast.  So loud...  the 22k resistor going to volume 3 helps pull the level down a bit.  It could even be a bit bigger or not there at all if you want something monstrous.

It just does one thing, and it does it pretty well.  If you like 386-based distortions, well, this is one 386 firing straight into another 386.   It’s a Doom box, which is perhaps why it has been compared to a Sunn amp.  The circuits are not even vaguely similar, but I can see where the comparison comes from.

There’s a reasonable amount of room on the board, but given it’s such a small circuit, it hardly matters.  It still easily fits in a 1590B enclosure.   I’d even be tempted to add another row to get the two 10u caps a tad further apart (I have built this using this layout, and they fit just fine).   I replaced the 1u electros with box poly caps just because I felt like it on my last build.

EARTHQUAKER DEVICES - ACAPULCO GOLD

EQD ACAPULCO GOLD MODS

It's so loud that some people like to add a 1M pot to control input levels.   Input to pin 3, pin 2 to the regular input on the board, and pin 1 to ground.

EQD ACAPULCO VIDEO DEMO