Would a 52mm throttle body for my 94 z28 give me any noticable hp or is it not worth the money? And if so what would be the best one.

 

I would say yes b/c of that cam and supporting mods. Do a search, this had been discussed many times.

 

Don't know how much you would stand to gain, unless you had heads, but you might still be able to get a reworked 48mm, modified to 52MM. I bought a used 48mm, so I could keep my new stocker, and sent the core into AS&M for one of their 52s. AS&M has very good rep for aftermarket parts, including 54MM, 58MM and Mon blade TBs. They used to sell their 52s for a good price when you sent in your 48 stock core.

Also, there are guys on here who will mod a 48 to 52 for you.

You might want to give AS&M a call to see if they still take cores for their 52s. JMHO