ho to compression check thats how you do it and buying the guage wil cost less then having a mechanic do it so why not learn somthing and do it yourself!!
after that we can get more in depth but if you are looking to build for boost i can dig up the parts needed and w/ these parts you should be able to bpps around 16psi at the track if not more i will get back to you asap and try to do the comp check soon that way I can help you get started!