Interchange on 350 - 403???
Registered User
Joined: May 2007
Posts: 117
From: Chatham-Kent, Ontario
It'll all fit, although the 403 heads are held down with 1/2" bolts, compared to the 7/16" for the other SBO engines. As a footnote of sorts, you'll lose some compression by putting 403 heads (bigger combustion chambers) on a 350.
- GoldOlds
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