Came across a set of N351 heads at a pretty reasonable price. I know that the flow numbers are excellent, but what else is there to them? Stupid question of the day: will the perform well on a mild built 302 with stock speed density computer? Any special exhaust headers required, if so will they fit a 4x4? Sorry, I now its a lot and I might find half of it on a Google search, but I prefer to hear it from the great folks at FTE....not to mention its been a long day, and I feel like my head is going to explode.
Thanks

Stryder

 

hers what i know
2.02/1.60 valves 195cc intake runner, 67cc exhaust.

flow numbers
.200 144/97
.300 160/127
.400 212/142
.500 232/161
.600 244/169
.700 255/172

Heres a staement from the offical factory guide to building ford short track power
"though the the 302 was certainly healthy in terms of power output, the N351 heads should be considered too large for a stock or mild street 302,with the GT-40 or GT-40x being the better choice for all around power."

Thats horse**** my friend, i would buy them. One thing to note is I believe the combustion chamber is small, I'm thinking 58cc but you better check into that.

M-6049-N351* Bare Head (64cc Chamber)

For use in NASCAR Late Model Stock, I.M.C.A., D.I.R.T., and most other stock car sanctioning groups on 351W engines

Much improved air flow over previous E351 heads

Developed by Ford Racing with the help of Larry Lackey and Robert Yates of Robert Yates Racing

Machined for 2.02" intake and 1.60" exhaust valve diameters

Intake and exhaust valves have been moved .070" to unshroud the intake valve

Valve angle changed from 20 degrees to 10 degrees to further improve air flow

Intake port volume 195cc, exhaust port volume 78cc nominal

Accepts stud girdle M-6569-C351

Thick deck and reinforced structure for improved sealing, increased section thickness in critical areas and webbed rocker bosses for improved strength. Designed for stud mount rocker arms. Compatible with stock and Ford Racing intakes

These heads use Motorcraft AF or AFS-series spark plugs depending on application


INSTALLATION NOTES

Requires M-6564-F351/J351 roller rocker arms with offset intake valve pushrod cup

Unique header flange required*****************************

Must use head bolt kit M-6065-C351 to install cylinder heads


THESE HEADS MAKE SO MUCH POWER THAT BRAND “X” RACERS WANT THEM DISQUALIFIED FROM “SPORTSMAN” COMPETITION!
Parts to assemble M-6049-N351*:
M-6566-D351* Pushrod guideplate (pkg. of 8)
M-6527-C311* Rocker arm studs (pkg. of 16)
M-6505-A351* High-flow stainless steel exhaust valve
M-6507-A351* High-flow stainless steel intake valve
M-6514-A50* Retainers (pkg. of 16)

Sounds like a pita!!!!!!!!!!!!!!!!!!!

 

WOW! That's a bit more than I was expecting. Thanks. Sounds like a bit much for my 302, but for $450 for the pair, I guess I might snag them for future use. NOt to mention, I'd have alot more parts to save up for to install them. Thanks SOOOO much for the info. My brain was so fried last night, I'm amazed I remembered to get online and ask.
Thanks again!

Stryder