PDA

View Full Version : Vortec BBC Heads on a Mk IV block


disco_charger
08-27-2002, 08:28 PM
Does it work, or are the water passeges different? Can I bolt up the new heads on the old block with no machining? I see these new take off heads for $450 all the time. I'm getting interested.
Disco
Bahner tunnel
08-27-2002, 08:35 PM
From what I understand , Mark 5 & 6 will not work on the older Mark 4 . The water holes on the newer heads are larger towards the valley and they don't align properly . Most after market heads will work on the Mark 4,5,6 .
77charger
08-28-2002, 07:44 PM
put the money into a set of merlins or equiv.
Dennis Moore
09-01-2002, 06:38 PM
No they won't work. Good book out called BIG BLOCK CHEVY MARINE PERFORMANCE (order at 626-675-3548) will show you the reason why they won't fit.
HammerDown
09-01-2002, 06:44 PM
Dennis Moore:
No they won't work. Good book out called BIG BLOCK CHEVY MARINE PERFORMANCE (order at 626-675-3548) will show you the reason why they won't fit.Yes it is a very good book...I have it. Glad to see ya here Mr. Moore, hope ya will answer some of our questions.