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82 GT · 05-23-2003, 08:13 PM

Isn't that what you want for the street though? Reving up much past 6k isn't ideal for street use anyway.
The 351w doesn't really like to rev really high like that because of their large journals on the cranks.
Only the '69-70 351 heads had larger ports and after that they had the same port and valve sizes of the 302's
Heads with higher flow numbers require higher rpms to make HP.
It's all about flow velocity which is important for a street motor.

05-23-2003, 08:13 PM	#5
82 GT Import Slayer Join Date: May 1999 Posts: 2,241	Isn't that what you want for the street though? Reving up much past 6k isn't ideal for street use anyway. The 351w doesn't really like to rev really high like that because of their large journals on the cranks. Only the '69-70 351 heads had larger ports and after that they had the same port and valve sizes of the 302's Heads with higher flow numbers require higher rpms to make HP. It's all about flow velocity which is important for a street motor. __________________ '82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator.