Thread: mismatched heads?

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I got to looking at the heads on my motor and they seem to have different numbers on them. On one there is GM 4 and the numbers 462624 and on the other GM 1 with 462624 but also have K 167 on it. Kinda lost about tracing these and finding out any history on them. Any input in this area would be greatly welcomed. On a different note I got my 1.6 roller tip rockers on and they seem to help with the low end take-off. But they are also making the motor a little thirstier, but guess you have to take the bad with the good.
Anyway, if someone could tell me if my heads are just plain jane stock or not would really be nice. Thanks to everybody with any thoughts

The 462624 casting number is listed as 1976-1999 350 c.i. with 75.5 cc chambers (and, if I read the abbreviation correctly, what appears to be 161 cfm intake port flow)

thanks, robot. Funny that they list as 76-99 as the block numbers I traced to 73 and coming out of an omega or c-60 body.I guess someone has played with this motor before I got ahold of it. Two things I do know about it is it's definitly a 4-bolt main and has never been rebuilt before I got it. I had it rebuilt 2 yrs. ago but just stock rebuild. Bored only .0010 so I got some room to work with still. Really appreciate you chasing down those numbers for me.

that K167 is a date code The K is a month K is the 11th letter of the alphabet so K = November the next 2 letters are the date of the month = 16th the last letter is the last date of the year, so they w0uld be 77 heads as they still bolt up to your early block with the standard 23 degree manifold.

http://www.mortec.com/