Help with building Motor

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Hi I have a few questions about my 89 5.0 motor I am now taking apart to put a cam, roller rockers, intake, TB.

1 How or where do I disconnect the Fuel lines from the fuel rail

2. What is the best way to change valve springs without removing heads

3. How snug to I make the new 1.7 roller rockers on there studs.

4. If I want to eliminate my A/C do I have to use a kit, or can I find a serpentine belt that will fit.

5. If I'm using an Elderbrock performer intake with stock heads can I just get stock replacement intake to heads gaskets.

6. Where Can I get a gasket to go in between the upper and lower intake for an elderbrock performer intake.

Thanks for all your help