as most of us know they are different then stock, i called holley and they told me the thread is M4.5 x .75, what the hell???? i couldnt find that anywhere so i called them again and they told me to drill it out and tap it???? WTF????? What screws have you guys used for this? or have you drilled and put a zert in??? any help would be great. ( i have the 112-507for 91-92 )thanks

 

I don't have any help for you, but man thats weak.... they actually told you to drill it out; cause they cant do it right the first time?

Man that's lame

Other than that how is the quality of the TB?... I was thinking of getting one for my 383, but I haven't heard much feedback other than bad.
Thanks for any info

 

i wouldn't recommend the 58mm TB unless you have more then 500 hp...TPI intakes suck in 2 much air if you don't have the power in the motor to go with the air your suckin in you'll screw up your air/fuel...this is according to what i hear.....what i would recommend is the smaller one i believe it's the 52mm TB if your not pumping about 500hp or more......and about drilling?? i never heard anything about that....thats awful..lol maybe the guy didn't know what he was talkin about...hahaha

 

I couldn't believe it when I tried to install my TPS. It's bad enough that they used a different thread pitch, but the screws they included were too short.

Didn't any of those ***** actually install one after they built it? Anyway... I just went to the hardware store and got the new bolts in the correct length. I don't remember what size they were, but the hardware store sure didn't seem to have a shortage of the size I bought.