I think the design is more like a boss super overdrive ? or vintage rat ? It has really kick ass grind with already "a little hair already coming from the amp" So through a clean blackface fender...It's no tubescreamer copy of ts 808's or ts 9's
I was wrong it's not a 308 chip. Looked at it closely and it's a Dual JFET chip called TL072CN Now i know why i like my Big lloydes overdose ! Both are JFET'S but Overdose is discrete and ol'yeller is a chip JFET.