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Old 06-05-2017, 10:06 PM   #10
Warrens69GMC
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Join Date: Jan 2003
Location: Safford,AZ
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Re: 305HO Heads on 307

Quote:
Originally Posted by BugzC10 View Post
Does the intake manifold have to be changed if you switch to the 305 heads?
416 (1980-1986) as posted with the OP, no they don't.

081 or similar TBI heads, you can grind the center to get the manifold to fit

vortec heads, yes you need to replace the intake manifold
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1969 307, t350
1950 Chevy Wagon
1978 Big 10
1967 C10, 250,3-OTT
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