exspansion valve differance?

[bautino95]

Hi everyone, I'm replacing my condenser and expansion valve after doing a r134 conversion. Anyways went to Napa auto parts today and bought the one for my truck per their computer. It was PN# 207337, and it has a coiled wire at the end where the one on my truck has the bulb on the end. Luckly I had some other numbers to cross reference for a different valve that I got from this Forum. The other PN# was 207300 and it has the bulb on the end, but their computer says it was for only 67-68. I have a 71. I know so much of the entire 67-72 years is compatible, but I just want to make sure they're not different in term of calibration or anything. Oh BTW theres a major price difference between them too. one was $40 and one was $18 LOL.. I hope to be able to use the cheaper bulb style and I read on here that those seem to perform better anyways. let me know what you guys think.
Thanks