Fuel Pump requirements and engine maxed?

[rk4g63]

I ordered the pump for 98 bux from SLS. Brand new. thanx guys!!!
Will I blow my engine if I consistently run 20 psi or should I cut it down to 18 psi for consistent running?
Keep in mind guys - this is a 1G 7 bolt with 133k and the engine has never been opened up to change/modify/improve anything. Timing belt etc has been changed every 45k. Bolt on mods as described in the original post.