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I need to order a new Exhaust Valve for a GT40p Head. I know the Face is 1.46". However what's the Valve Stem diameter? I thought it was 0.341" is this correct?

Hi, I'm planning on putting some gt40p heads with 1.72rr on 1988 stock motor with the stock cam. I'm not sure about what valve springs I need. Any help would be greatly appreciated, thanks.

A guy I know is offering me 600$ for a vortech supercharger. It seems like a good deal but is buying a used supercharger a bad idea?

Will the factory connecting rods from a 2000 5.0 hold up against nitrous or boost?

I'm about to start my rebuild (2000 explorer 5.0)and I'm unsure about a few things. I've decided I would like to add boost or nitrous unsure about which one, leaning more toward nitrous. Would I need to upgrade my connecting rods or will stock work? And other then pistons what do I need to...

I just bought myself a 99 Explorer motor to rebuild and I know this rebuild is gonna hurt my wallet. So I was wondering will the factory mustang headers work with the gt40p heads?

Will Mac equal length shorty headers work on GT40P heads with out burning spark plug wires or having remove the headers for a tune up?

I'm rebuilding a 5.0 to put in my 88 GT. I wanted to get late 90s Explorer motor because of the heads and intake but I'm not sure if it will bolt up like the stock motor. Will I have to change out the computer and can my air pump bolt back into place? Does anyone know of any other obstacles as...