Italian track is now in sync.
Nearly there!
Just to explain a touch on why this took me so long. The image source is the cut German DVD with the uncut inserts coming from the Italian TV version. The English audio that I dubbed onto this composite came from the uncut UK pre-cert VHS.
All well and good but after listening to it a few times whilst syncing it up I noticed, for the first time, some issues with PAL speed-up. Most noticeably Henry Silva's voice sounded a bit like a chipmunk. So to try and rectify this I had the whole thing converted to NTSC (cheers Marc!) so as to slow it down a bit. So far so good...
Only now I start trying to sync up the Italian audio and realise that it's from a PAL source and won't line up with the new NTSC transfer...

Add to this the PAL Italian TV version has an advert break in it which needed editing out. So I edited out the adverts, time stretched the PAL audio so it sync'ed with the NTSC speed and then sync'ed it all up with the NTSC composite.

Need to re-time the subtitles now as they were created for the PAL version...