Re: 074 head repair
Got this from a guy on Team Chevelle..its the problem I have....
Think it could be fixed??
This was a common procedure back in the day of those heads, to put in longer rocker studs on the bottoms, and unless you were real careful you ended up drilling clean through the exhaust crossover? This is only on one stud on each head! The idea was to "double-helicoil" the original threads by drilling down deeper! Both these particular studs needed to be 'trimmed" in their respective locations before installation!
ARP still sells the stud package for these heads!
You don't say how much water was in where, but this was a very common error when working on the "074's" AND the later "077" casting as well!
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1969 9566AA COPO Chevelle M-22
1969 Malibu 489 ZL-1 T-56/4.56
1969 Beaumont 540 th400 3.70
1969 Chevelle 300 Deluxe 427 ZL-1 M 22W
1970 Olds 442 W 30 2 door post
1969 Ply. GTX 426 hemi auto. Blue.
1940 Dodge pick up Durango 4X4
1968 Camaro ragtop LSA ZL1
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