LD4B Intake question

The 340 is basic X heads mildy ported, Ld4b has been port matched, Mopar 484 cam, Doug's headers, and 2.5" Pypes exhaust system. I bought a thermostat spacer from Summit Racing, but the mechanical sending unit hits the thermostat. Figured somebody has run into this before and came up with a fix. I forgot about this issue when the motor was out, or I would have addressed it then.