Cool. with your big rod the trick is loading the rod properly, firstly and i dont wanna sound like a shcool teacher but lake sure you have a good shock leader well tied to your main line, this will absorbe some of the stresses when casting and ensure your line dont snap and you wont kill anyone with a wieght..
the cast its quiet hard to explaine and i'm not the best caster in the world but i can hit over 120m
1, Face the way you want to cast, and look to where you want to cast.
2, lay your wieght on the ground behind you at about the 8 oclock posision (12 oclock being infront of you) with a fair lenth of line.
3, bring the rod to about the 7 oclock posision
4, look again at where your trying to cast.
5, DONT try to power your cast like your swinging a sledge hammer less is more to start off.
6, Start your cast slow and power through at the end
7, keep the but off your rod high, this will ensure the lead flys high.
hope this helps, sorry for the poor description, if i could write i'd be an writer not a plumber lol.
practice on the beach or a football field, and practice plenty and you'll soon get it. I'll be out for a practice the back end of next week at shields beach if you want a demo.