when my car gets to 40mph or more the car will start to shake uncontrollably when the rpms drop to 1500 can someone help me? Just replaced plugs and wires and fuel pressure regulater

sounds like it might be a Torque converter problem... but i will let someone else chime in too
this should probably be in 92-99

Please don't post mechanical problems in General Chat.

Moved to the proper section (where it will get the proper visibility to help you).

Welcome to Bonneville Club!

Was the car doing this before you changed the plugs and wires, or only after?

Won't hurt to double check the routing of the ignition wires from the coils to the plugs.
Should look something like this (your engine doesn't have the supercharger, but your wire routing is the same as shown (thanks Haro, for the image)).

sorry willwren
didnt no im new to the site
you other two people thanks ill check it out