I want to purchase a throttle body and throttle body spacer for my bonneville. Is this a good idea? And what kind of performance gains will i get.
Currently have cai on it. I wanna order the TB, TBS, and Magnaflow exhaust. I need to know if this is good choice.

The spacer really won't benefit you much unless you're planning Nitrous or Water/alcohol injection. And nobody makes one. I could draft one up for you in CAD to have one made.

I know Domestic Performance was looking into this, but I don't believe it ever went anywhere. I think a TB spacer is more effective on a TBI than a MFI or TPI system.

If its not to much trouble to design it that be great. Im a cnc programmer/operator, it would be no problem to make it.
If its a hassle to design dont bother. I dont wanna take up your time.

I would need a Series 2 L36 TB in my hands, and about 1/2 hour at the most, and could provide it in any CNC format you desire.

No problem for me, but probably not worth your time and money. The gain might be neglible.

Please post your trim, year, and mods in your sig.

If your looking for a TB spacer check out www.zzperformance.com as they have them already for gen 2'*. The prefered method is to tap and plug the coolant holes either on the bottom of the SC (like I did) or on top of the intake manifold however the TB Spacer is cheaper and probably ok for light modding.

EDIT: Unless your N/A in which case why are you thinking about doing this?

Todd, according to his screename, he'* an L36 SE, which is why I was thinking this wouldn't do much for him.

Considering the fact that he'* a CNC operator, he can have one made for far less than ZZP'* spacer if I provide him with the files he needs.