I'm sorting out stuff for the swap meet and have 2 sets of heads that I'm not sure what they are, 3992441 are the casting numbers and the other is 383682 thanks ..speedy

Speedy, you sure those numbers are right? This is what I found on MORTEC: http://www.mortec.com/castnum.htm

3836842....57-67...283/327

3932441....69-70...350..........76cc chambers
3932441X...69-70...350/400......80cc chambers


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Joe
1969 Camaro - The Hole-y Grail Project
HwyStar@Rochester.rr.com
HwyStar's Garage! (http://www.geocities.com/hwystarjoe/index.html)
1970 Malibu (http://home.rochester.rr.com/hwystar/page2.html)

Yes they are the right numbers except there is an x after the 441's I didn't think it was right becouse I haven't seen head casting numbers with a letter after them before. thanks for the help and the cool site for numbers...speedy

X head is a good big chamber head. I believe Vette & Z28 like 71 or 72 up.