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351w heads?

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Old 02-23-2007, 06:47 PM
  #11  
93whitelx
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Default RE: 351w heads?

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ORIGINAL: dthompson67

yes the 351w heads bolt up just fine. actually my friend is building a 347 using 351w heads. he is porting out the hump in the exhaust ports to allow more airflow.
well his heads are junk now , never port your heads, unless he has a shop do it

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Old 02-23-2007, 06:49 PM
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90mustang5.8
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Default RE: 351w heads?

ORIGINAL: 93whitelx

ORIGINAL: 93whitelx

ORIGINAL: dthompson67

yes the 351w heads bolt up just fine. actually my friend is building a 347 using 351w heads. he is porting out the hump in the exhaust ports to allow more airflow.
well his heads are junk now , never port your heads, unless he has a shop do it

well if u've done it b4 it would be fine...
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Old 02-23-2007, 07:19 PM
  #13  
93whitelx
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yeah sry forgot to add that
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Old 02-23-2007, 07:36 PM
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aode08
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Default RE: 351w heads?

I have 1969, done over with 1.94 and 1.6 intake valves, .550 springs, stage 3 port and polish, enlarged bowls. there sick, still havent figured out a way to wipe the smile off my face

but when they were stock, id say 20rwhp over stock, nothing more[&:]. Bang for the buck yeah, but honestly, that kinda work I had done will out cost a pair of aftermarket heads by $300, so Id leave em alone.

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Old 02-23-2007, 08:31 PM
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pastfast125
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Default RE: 351w heads?

yea, well I figured if stock 351w heads would open it up a bit more than my stock 5.0 heads I would swap em seein as I can get em for free. Only problem is my heads have upgraded valve springs and I dunno if they'd swap over
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Old 02-23-2007, 08:56 PM
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ZachW04Stang
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Default RE: 351w heads?

Don't you need to get head bolt bushings to put 351 heads on a 302 since 351's have larger head bolts?
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Old 02-23-2007, 08:59 PM
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Pearlkobra12
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Don't you need to get head bolt bushings to put 351 heads on a 302 since 351's have larger head bolts?
yes u do. i did on mine...
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Old 02-23-2007, 09:25 PM
  #18  
fordstroker
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just use the arp stepped shoulder head bolts
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Old 02-23-2007, 10:15 PM
  #19  
pastfast125
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Default RE: 351w heads?

so where there be any point to swappin out my stock 302 heads for 1991 351w heads? Remember this is free, is there anything that would make it worth doing.
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Old 02-23-2007, 10:20 PM
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90Lxstanger
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Default RE: 351w heads?

ORIGINAL: aode06

I have 1969, done over with 1.94 and 1.6 intake valves, .550 springs, stage 3 port and polish, enlarged bowls. there sick, still havent figured out a way to wipe the smile off my face

but when they were stock, id say 20rwhp over stock, nothing more[&:]. Bang for the buck yeah, but honestly, that kinda work I had done will out cost a pair of aftermarket heads by $300, so Id leave em alone.

Yes, get that old ones, im pretty sure 69-71 are the ones you want anything else wouldnt be that great, i dont have the numbers but i think the vavle size or chamber size is different compared to the older heads.............
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