Have been told that a 2 litre will not fit in IRS 1800 combi box-true or false, while on the subject what about a 1600 swing rear?

Yes it will fit if you use the 1800 flywheel and starter . Same goes with the 1600 box but you need a new spigot bush for it. Mark

Thanx Mark, building another buggy - bigger,better,faster.....