Ok i get heat soak but do spacers really help?

that was one of the prime reasons behind the ThermoQuad.
In 1971, when I ran a Holley on my Cuda, I made a large aluminum plate sandwiched between throttle plate mounting surface and the top of the intake mounting surface. I figured it would break the thermal conduction connection, and reflect engine heat away from float bowls. It worked great.
You could try replacing the needle and seats in the Carter/Edelbrock, they can become worn. Look down the venturi after hot shut down, if you see wisps of white looking smoke wafting up, those are raw fuel drops evaporating from the float bowl overflowing. That is because the needle and seats are not working properly and/or excessive heat in the bowl.