Valve clearance?

1981 CHEVROLET SILVERADO
85,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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DIRTFLOORGARAGE
  • MEMBER
  • 3 POSTS
So, I’ve been watching the LM7 build, and I was curious if the summit pro LS pistons would be compatible with a .600 lift cam, I’m using stock 799 heads but upgraded springs rockers ect.
Nov 30, 2022 at 9:32 AM
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RYAN L
  • ✓Experienced Mechanic
  • 272 POSTS
Hey there!

Thanks so much for watching the series and using the site.

Yeah, it should ours is 231/242 113+3, .600/.600 Lift and it had enough clearance.

Best,
Ryan
Dec 1, 2022 at 4:39 AM
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DIRTFLOORGARAGE
  • MEMBER
  • 3 POSTS
My man! Thank you!! The cam I’m using says 110 for centerline.
Dec 1, 2022 at 4:43 AM
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DIRTFLOORGARAGE
  • MEMBER
  • 3 POSTS
Here is a short video of the specs:
Video (Click to enlarge)
Attached Media
Dec 1, 2022 at 4:44 AM
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RYAN L
  • ✓Experienced Mechanic
  • 272 POSTS
Yeah, should be all good. If you are really nervous about it, you can assemble the valvetrain on one piston with playdoh on top of the piston, rotate the engine over by hand slowly. Then remove the playdoh cut it in half to see how close the valve gets.

Here is our camshaft card so you can directly compare.
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Dec 1, 2022 at 4:49 AM
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