Thread: 400 vs 428 - Help Me Decide
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  #7  
Old 09-18-2021, 10:15 AM
markpj23 markpj23 is offline
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Join Date: Sep 2006
Location: Las Cruces NM
Posts: 390
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Quote:
Originally Posted by steve25 View Post
... What are the casting numbers on the center exh port of your 400s heads?
Looks like I have the 6X heads w/the vertical boss, so 6X-4 heads.

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Mark
Las Cruces NM
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Current Project:
'67 Catalina Convertible
400 4-spd
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