Advice please on my Fox 36 Talas R’s

OK Got a pair of Fox 36’s, they are the brown coloured one’s, now does this mean they’re 2006 (I bought 2nd hand so not sure)?
Now the main question I have is with travel, I’ve measured the effective stanchion and it only measures 150 mm, now presuming they don’t bottom out on the crown this will only give me 145 mm travel, the Talas IS wound to max travel. I was sure they should have 160mm max travel? Can I rectify this problem, if indeed it is a problem?!

brown ones are 05-06 and they came with 150mm travel, no idea how to tell the difference between them

That’s all I wanted know, ta

do they have negative travel (top out)??

Conks

Don’t think so, only a shreader fitting on the top of the left leg?