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Hose is too short. Hose is good for manifold to plastic tree connection on firewall, but will not reach the brake booster from either the plastic tree or the engine manifold on the 70 mustang or cougar.
Just reaches and so a perfect fit for and original car.
These pre-sized hoses WCCC offers have so far all been dead on and of really nice hose, maybe better than I could have done chasing the hose locally. And if a P.O. or shop has replaced the OEM with something half-baked, you can get the proper appearance by snagging one of these.