My girlfriend has a 1994 Dodge Shadow with a v-6. I noticed the other day when 55mph and to about 63 the front end shakes, Only when foot is on the gas. Take it off and smooth riding. I'm thinking cv joint or something. Kinda ruled our tires if it doesn't do it all the time. Answers would help. Thanks.

Hmmm, that's interesting but Im thinkin its a bad motor mount(s)... no idea how to check motor mounts.

you can check your CV joints by making a hard right and a hard left hand turn... if you hear any clicks noises then ur CV joints are bad... also check the boots to see if the boot(s) are split.