yes those flare nut wrenches are an excellent idea when loostening hoses. the hose fittings tend to be difficult to loosten since they tend to be pretty old when you need to loosten them. so use some pb blaster on the fitting. in some cases you will want to use a second wrench on the other side of the connection you are wanting to get off, as in when the connection is on a bracket.
proceed with caution and try to avoid stripping the nut lands.

otherwise the change proceedure is simple.

good luck

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.