Porting the heads takes a lot of time and with the combo you are building won't make all that much more power. I can't remember off the top of my head but I think I spent about 20 hours porting the ones for my Explorer and twice that on the AFR's in the Cobra. Also, I don't have the tools to set the valve springs up so you'll need to have those installed by a machine shop before we put the engine together.
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