OK it's been a little while since I asked a question so here we go
I actually asked this in the "Spoke patterns" thread in technical but so far no response; so I thought I might put it up here:
Spoke lengths for 19" front Borrani rim And 18" Rear Borrani rim....I got the following lengths for 4 cross pattern:
"8swg x 85/8" (219mm) for the front and 8swg x 85/16" (211.2mm) for the rear"
From the a-fore mentioned thread but am just looking for confirmation before I go cutting and rolling spokes.