Not sure with the performer, but with a Torker it did seem to make a diference on mine.  I would say try it without and if you get the time to make the bracket, rig something up so you can try it with the spacer.  Pick ther performance you prefer.

Probably won't notice at anything under 4500 rpm,or so, they do seem to have a "ram effect" above that sweet spot, if its going to be a pain in the rear Iwould run without and mess with it later, but thats me, did you cut down the divider in the carb opening, most of the time you can take approx. a 1" by 2-12" section out of the web between the left and right ports (a lot like a Performer RPM) I've seen this a bunch of times, this tends to improve idle quality and give just a tad more top rpm, may not need the spacer,  Use the "Assenometer" to verify it

I use a spacer on my open plenum and you can tell with the tach that it works, (850 carb and a 1" four hole spacer) which is different than what you have so Dunno.

As for a bracket you can get one from Dana Marine. I had to flip it over cause my throttle cable was too long to route straight to the bracket. So I flipped it over and made a return spring bracket as well, the cable comes to the bracket like an automotive application.

  T.J.

thats a nice setup you have, i even thought about that type but then i would have to get a new go pedal...... mines a push , i believe yours would be a pull correct ?

But very nice

2sav

Nope it is a push. It pushes the bottom of the arm on the carb.

T.J.

Was the original "spacer" there to adapt the square bore Holley to the cast iron spread bore manifold?  Are you using a Performer or Performer RPM manifold now?

Cheers, Mark

Bingo Mark....Winner,Winner,Winner! After further research and development....that is what it was for....I dont NEED the plate with this intake and the holley...so it's more extra styff in the garage :banghead:Ahhhh...the life of a jet boat owner!