chevy iron head

SSDiv6 · 12-15-2013, 06:28 PM

Quote:

Originally Posted by firebird

in modified class -you can run any cast head as long as it has in my case a gm casting number.the 4446 vortec looks best for the class with a 10.5 weight per cube and a 366 cube limit and a 3300 car-.Can you all give your opinion and advice ------THANKS-- FIREBIRD

Yes, the Vortec 446 casting is legal in SS/CS class. Michael Mans has his SS/CS engine for sale on this site and it is a record holding engine.

chris ok · 12-15-2013, 11:49 PM

I do believe some of these vortec heads are getting hard to come by nowadays. There are other heads approved for the combo. I think they are RHS or Dart.

I stand corrected. the heads my frriend uses I thought he said were no longer available. sorry.

SSDiv6 · 12-16-2013, 10:41 AM

Quote:

Originally Posted by chris ok

I do believe some of these vortec heads are getting hard to come by nowadays. There are other heads approved for the combo. I think they are RHS or Dart.

25534445 is the part number for the bare cylinder head and 25534446 is for the whole assembly. They are still available from many vendors. I believe Michael mans tried all the other approved cylinder heads and he still made more power with the Bow Tie Vortec head.

12-15-2013, 11:49 PM	#2
chris ok Senior Member Join Date: Jul 2002 Location: Long Island, New york Posts: 592 Likes: 131 Liked 46 Times in 29 Posts	Re: chevy iron head I do believe some of these vortec heads are getting hard to come by nowadays. There are other heads approved for the combo. I think they are RHS or Dart. I stand corrected. the heads my frriend uses I thought he said were no longer available. sorry. Last edited by chris ok; 12-22-2013 at 11:47 AM. Reason: I was wrong.