I have a 2012 ford f150 with the 3.5 ecoboost v6. It has 131000 miles on it and has been a great truck. Lately it has felt like it didn't have any power and would really struggle to get to speed or climb grades. A check engine light came in so I took it in to a local mechanic. They diagnosed it as a timing issue and have quoted me 5420 bucks to install a new timing chain. Is this the going rate for this or should I be looking elsewhere?