fuel pressure regulator

looking for advice on changing fuel pressure regulator how long
to do ,how hard

just got an adjustable fse one from rpi, took under an hour to fit and most of the hard work was drilling holes for the mounting bracket in the bulk head and then try to get the supplied screws to turn through the steel work (thread to tight on screws for thickness of steel on bulkhead). if you can pick up some pre existing mounting holes somewhere on the bulk head its a 15 min job to fit and easy. some grease on the hose connection makes getting these on easier. everything you need bar hose clips for 13.5mm fuel hose is in the box, the mounting bracket may require bending to a right angle like mine dod as its just flat plate. FSE instructions are really poor but if yoiu search the faqs on rpi engineerings site there is a good pdf with pics (note my 3.5 kit doesn't have the adapter plate as per 3.9 instructions as not required). good luck as worth doing.

Got mine changed recently by a garage, they said half hour with the gearbox out or an hour with it in. (The gearbox was out for something else at that time).

if you mean on DICO TD 5 at back of head.
it took me 2 hrs bottem bolt can be a bitch you cant see it.
Some say take starter off and do btm bolt from below i never.
you need 14 mm spanner for pipes.
Prepare to do a bit of strugling