I recommend you call TEA and get a quote. I supplied them my 243 heads and assembled the valve train myself making the total cost considerably less. With that said, I forget what valve springs you have with your current setup which may not like a MS3. They also had the heads back at my door 10 days after sending them out!
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1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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