Head questions

[SAndreasen]

Are the valve seats in these 24 valve heads replaceable or can you just grind them

 

[Chief USA]

The seats are prone to cracking and are in most cases machined down and new hardened steel seats are pressed into the head which can then be ground to whatever angle wanted if so desired.

Deboss Garage just posted a video on this very topic on their P-pump Conversion series. The meat of the topic starts at 2:40.