360 heads on a LA 318 vs Magnum heads on a LA 318

I'd like to go solid, and if I do, I'll most likely build my own solid roller lifters. First, most solid roller lifters are for non-roller blocks. 2nd, the price for solid roller lifters are incredible!.
what size solid roller you thunk'in????? would love to see details on "building" solid roller lifters,..im guessing from factory hydraulic roller lifters??