Quote:
Originally Posted by 69gumby
These head numbers you all are talking about are these the last three numbers in a longer number? If so what is the whole number?
Also these vortec heads, will they bolt onto my 3970010 block and will my AC, Alt, Power steering just bolt on.
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yes they are....here's the Mortec snip on my heads...
3998993....current..350.........Goodwrench crate motors,"Hecho en Mexico", 75cc chambers
There's another 3998993 head that went on the 72-73 307/350's. I was told the newer ones were better, but in all truth I didn't compare them, there were on flow numbers available for the old ones.
Here's the 882 number....
333882.....74-80...350/400......76cc chambers