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Installing 1970 351w heads onto a '91 302 HO

5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Installing 1970 351w heads onto a '91 302 HO

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Old 07-12-2006, 02:33 PM
  #11  
aode08
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Default RE: Installing 1970 351w heads onto a '91 302 HO

I am very pleased and paid only $500 for these puppies from a machinist, honestly an insane one !


He had a 351 bored over .60 and 408 stroker installed, with two turbos ON THE LUNCH TABLE and an entry box for all customers, I didnt even enter, that thing scarred the living daylights out of me just looking at it.
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Old 07-12-2006, 06:47 PM
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hellas85stang
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Default RE: Installing 1970 351w heads onto a '91 302 HO

what valves are in the 70 heads..i had 302 70 yr heads and stock they had 178/14 valves....i think windsor had 184 145 valves ...so.thats what ya need to do for piston to valve clearence...take off heads anddo a piston to valve clearence with playdo. machine shops do it to.... thats all ya need to figure out and use like 9860 edelbrock head bolt bushings...goin from 58 chambers to 60 will not lose that much comp...but if you have lil vales then id make them mill the heads a lil...i have a set of `970 302 heads for sale with 1.94/1.54 valves..big sprigs,andstuds...fresh machine work i just wentto aluminum....63 chambers..u cam mill them down tho..
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Old 07-14-2006, 09:38 AM
  #13  
aode08
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Default RE: Installing 1970 351w heads onto a '91 302 HO

are the heads on ur car , or did you decide on diff ones
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Old 07-14-2006, 10:00 AM
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P Zero
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Default RE: Installing 1970 351w heads onto a '91 302 HO

Creeper you cant use the 351 intake its too wide. There shouldnt be any issues with piston to valve clearance unless youre going with a HUGE cam.
-P.
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Old 07-15-2006, 09:38 AM
  #15  
aode08
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Default RE: Installing 1970 351w heads onto a '91 302 HO

I didnt notice he was going to use a 351 intake lol

no, you want to use your stock 302 intake or any aftermarket 302 intake,. It will bolt on 100% fine and no problems.
I love these heads .


While they are out, port these runners good, SO YOUR MOTOR CAN BREATHE.



Youll be happy with a mild cam, some 1.6 roller rockers, underdrive pullies and your timing bumped up a little.

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