243 LS heads - fully assembled

[bootlife]

6.0 or 5.7 heads?

[AFSP1211]

They were aluminum 5.3 heads. What engine size they came off of doesn't matter. All that matters is the year they were made. Some early ones had probs with the casting process or some shiz. These should be good.

[qwk_snd]

They were aluminum 5.3 heads. What engine size they came off of doesn't matter. All that matters is the year they were made. Some early ones had probs with the casting process or some shiz. These should be good.

Yes yes yes. Thanks bud.

[bangbangskeetskeet]

They were aluminum 5.3 heads. What engine size they came off of doesn't matter. All that matters is the year they were made. Some early ones had probs with the casting process or some shiz. These should be good.

Not totally true...if they came off an 6.0 ls2 and are stock they would have the sodium filled valves so yes it does matter.

[qwk_snd]

Not totally true...if they came off an 6.0 ls2 and are stock they would have the sodium filled valves so yes it does matter.

He's talking about the casting, boss. But yes...