[Healeys] 3000 turn signal control box access

[goldengt at cal.net]

I have traced the fault of my left front turn signal to the big control 
box on the left inner fender. The upper mounting screw of the box is 
under the fresh air duct. I think I have to cut the duct as I can't 
shove it back towards the carbs more than a couple of inches. I thought 
of piecing the duct back together with some large pvc sleeve inside it. 
What does the list think?
Also are the repro relay boxes any good?
Thanks,
Ken Freese
65 BJ8