having to buy a reed block will raise the price some, but it should still end up being less then vespa cases.
as for the transfers... from all that i've read the way i understand it is that stock LML cases are a close match ( cases to cylinder kit. ) to a 166cc malossi kit. and to get the most performance they would need to be made a bit bigger for a 177cc pinasco or polini kit. (thought it should still work o.k. without making then bigger.) you should definitely double check that, but i'm pretty sure.
it is also my understanding that LML cases aren't '5-port' but the LML cylinders are.
how do you like the pinasco kit? i've read some good things about it. i bought the alloy version and i'll put that in when it comes time for a rebuild. i'm thinking i might go with a pinasco crankshaft at that time too. and a 24/24 T5 SI carb. i've already rebuilt the clutch from a stock 21tooth to a 22tooth to give it a bit of an upgear without having to split the case... i really like it, just one tooth size up makes a noticeable difference. (a bigger difference then i thought it would.)
let me know which way you end up going.