Are the SBC NKB200 Aluminum cylinder heads (Skip White) the best deal right now for assembled heads? Are they bolton ready? Vortec replacement? What do they flow? and more in this video

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Used bottom end 355 with skip white heads dyno test
   • SBC Dyno Test! Cheap Aluminum Heads /...  

Link to heads
https://skipwhiteperformance.com/cata...

DNA Heads $245 Bare casting
https://amzn.to/3AmE79r