Thanks for the notice Captn Obvious!!!!!It's slapback. The best pedal for slapback is . . . a delay pedal.
I used the Dano BLT for years, but the Rogue "Analog" delay is more robust and true bypass. It is in sale right now at MF for dirt cheap. Has more than just slapback, but that is all I used it for.
The general thinking was that pretty much any echo pedal will do a rockabilly slapback and in context there will be very little difference....