Quote:
Originally Posted by KingLT1
And there lies your problem which is why I don't recommend porting stock casting without fully reworking the heads...new valve seats, guides, valves are a must imo.
I would just buy their aftermarket casting at that point.
Screen shot below taken off TSP website.
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Interestingly enough, I am almost certain I never saw that warning when buying my heads, not sure if they had it up a year or so ago?
That being said, I think there is a pretty big conflict on interest here in them selling aftermarket castings. I've never seen a GM TSB or anything about seats "falling out" especially in stock applications.