I’ve a VW Baywindow 1979. With a 2ltr Type IV engine, running twin Webber ICTs. Currently running a 009 style dizzy. It should have a vacuum advance dizzy, so looking at your VW-R-V product. If I was to use a 123 product, which should I got for to fit a type iv engine? And which advance curve should I use? It’s not clear form the manual. Generic curve 0 I assume, unless you say otherwise.thanks