Tc and I went through this a while ago. There is only one radio that fits a 1954 truck I have one.. I got my fixed for $200.00 I could not find the speaker mounting plate But I installed the radio and was able to fit the speaker in between the radio and the grill the magnet on back of the speaker attaches itself to the radio I then got some alluminum flashing and attached that to the back of the radio this served as a dust cove and also if your truck leaks it stops water as well remember you have to have the front bezel for the front of the radio. I have some good pictures of a 54. If you want them I will email them to you... A 1954 in great shape sold for $1000.00 last month on ebay. have fun . get back to me if you want the pics.