Oh that Sloy
Thats where the power staion is if I remember correctly
In that case your best bet will be the PA repeater, its situated in Langbank on the south side of the Clyde, 145.625m RX with a 600k shift down for TX.
You should be able to pick up the repeaters across the central belt, Perth, Stirling, North Glasgow while on route.
I would give you a shout but I am in Aviemore working with Raynet on a charity event, 50 mile walk in 24 Hours, for the Prince of Wales trust