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coupe · 02-10-2010, 07:16 PM

Port the lower, yes... but I'd also install a box-upper on it (Downs, cartech, etc...). It will really wake up the 306 especially with the X-303 cam and the Windor Sr. heads.

02-10-2010, 07:16 PM	#4
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Port the lower, yes... but I'd also install a box-upper on it (Downs, cartech, etc...). It will really wake up the 306 especially with the X-303 cam and the Windor Sr. heads.