1995 f150 knocking noise

i have a 1995 f150 with 302. 145000 miles.
if i hold the brake and give it gas it will make a knocking noise(only under load(in gear)). sometimes if i take off going uphill it will do
it a little also. also when im driving at about 40-45 it will shake sometimes. only thing i can think of is a motor or trans mount.
Posted using the http://www.autoforumz.com interface, at author's request
Articles individually checked for conformance to usenet standards
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.