Thread: Gen V swap L67 nipple size

Im doing a Gen V swap in a few days and been doing alot of research on it before i start. Im pretty sure i have everything in order that i need. I know i have to drill out the brass fitting under my throttle body and tap it to run to my PCV system. My only question is does anyone know what the tap or nipple fitting size is that i have to use? theres a bunch of write-ups, but none tell the size. any help would be thankful

Originally Posted by sseilmnop

i used a 1/8 npt tap on the L67 throttle body

thanks for the info. I've got everything i need ready for the install (adaptor plate should be here tomorrow). i was hoping to get that info asap so i can get on it right away. i was thinkin about porting my throttle body....do u know if i have to tune after?

Originally Posted by TheOtherNick

Yeah you need a tune after a ported tb.

thanks for the heads up...i read post but nobody mentioned it. I was heading to the yard tomorrow to pull one to do. There's actually 3 l67s there untouched (2 GTP, 1 regal GSE).

yeah, im working on setting up a tune now. would i have to do it right away? i plan on doing the swap tomorrow, but gotta wait bout a week or so for a tune...would that be bad?