The delete cover is rectangular and the radio hole behind it is oval.
I have a 55 2nd. I have an original which is am. But since am doesn't work at night I bought a Custom AutoSound. It's not the best radio but it works for fm reception and noise.
These trucks are not sound proof, are very noisy, and noise is all your going to get.
Maybe I should get a boom speaker that all the kids with jappo cars have. BOOM BOOM BOOM