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xe274hr gt-40 cast iron heads

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.

xe274hr gt-40 cast iron heads

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Old 12-06-2008, 05:19 PM
  #11  
Portmaster
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You may want to hang on. One of these guys may chime in and give you some good news.
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Old 12-06-2008, 05:21 PM
  #12  
86HOGT
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I have that same cam in my stroker and it is awesome! I sort of wish I went bigger with the 284 though...
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Old 12-06-2008, 08:36 PM
  #13  
ZachW04Stang
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Your going to have to check piston to valve clearance with that cam. Your also going to have to get the spring seats machined on those heads to use that cam. Aftermarket springs for that kind of lift won't be able to be installed at the proper height without machining the seats.
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Old 12-07-2008, 07:51 AM
  #14  
wrenchturner75
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back in the day i ran the motorsport x-cam with the factory sled rockers and at 542 lift they were fine. ptv clearance wasnt an issue either. they say the sleds are good to 550 lift so i was right on the edge.
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Old 12-07-2008, 11:37 AM
  #15  
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The exhaust lift is 565 and the intake is 555, but it's the duration that people over look when thinking about PTV clearance...CHECK IT.
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