Everything's pretty straightforward. I did mine (actually a few times to clean the old one when I discovered the neck was broken) and replaced with a new reinforced Behr on my 560... You should be able to do without getting filthy,etc. I can't remember how long it took considering I ended up detailing the engine and all kinds of crap that kept me out most of the day. I figure it should take no more than a couple of hours (worst case if you have no idea what you're doing).
1970 250C SOLD
1971 250C SOLD