Single hole pull out kitchen faucet in 2000 LXI

[luckyron1]

Looked like a simple job at first glance. Ordered the brushed nickle one from
PPL motorhomes. Got it, looks good. Checked out the installation instructions
& hell even I could do it. Looked again, not so fast, the sink is in the
kitchen slide out and the copper water lines coming off of the faucet are of
different lengths then the ones coming out of the new one. I sure don't want to
get involved in any pipe cutting/welding, and I'm not sure if those poly red and
white water lines will pull/push adjust once I get the old one out of there.
Maybe I should call a plumber? Anyone been there?
Thanks.

Ron & Ruth in MN summer camp
2000 LXI