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View Full Version : Head decoding and terminology


efinger
03-20-2007, 07:16:26 PM
head cast numbers

are

462624


So are these 462 heads?

or are they

624 heads?


If theyre 624 heads, dont tell me they suck--I know.

thx!!

355ciSB
03-20-2007, 08:08:17 PM
The 462 heads are double humps. They go by the last 3 digits. So, your heads are 624, just for short reference. I hope my info is right?

79camaro2001
03-20-2007, 08:18:48 PM
that is it, you have 624 heads.

pdq67
03-20-2007, 10:45:23 PM
Try here for a bunch of head info even if it isn't 100 percent complete!!

http://www.chevytech.net/

And consider that -041 heads are like double-humps but have a flat rect w/ a half sided triangle centered on it instead of the classic double-hump shape.

pdq67

PS., I have;

Big valve -461, medium valve -462, big valve -291, 1.84"/1.50" 305HO, -601, and small valve '56, 265", -306 sparkplug trough SB heads too out in my garage.. As well as a pair of '70 or '71 heavy 400" heads.

Air_Adam
03-21-2007, 12:49:17 AM
www.mortec.com

night rider
03-21-2007, 01:46:30 AM
yep you go by the last 3 digits.. So 624 is what you got