The 6506 came out towards the end of the 00 series so was not out long before the 10s were introduced.
I wouldn't be put off by the 5.9 in a 66. Same engine as in a 3650. I liked the right hand reverser in the 00s better than the 10s LHR.
I haven't been put off just something different!!
I'm used to a LHR