AndyF/AREngineering makes a nic one for the RPM intake that mounts it standing up in the gap/valley area at front of intake.

I have a RPM on my 88-440 truck and used the stock 4-V throttle/kickdown bracket and 3 piece linkage from a 78 truck.

I had to raise the clamp for the throttle cable on mine but other than that stock bracket worked for TV linkage.

AndyF makes a tall throttle bracket for the RPM intake also. looks stock but much taller at the throttle cable clamp. works with stock 3-piece linkage.