There should be a set of scribed marks equally spaced on the crank pulley, give it a good clean and they should appear!

Great, sounds a sensible idea I'll get the spanners out at the weekend and see if the bob weights are ok then move onto advancing the timing until she pinks, luckily I have a nice gentle hill nearby I can trundle up in 5th!

Having just fitted an electronic ignition kit to my 3.5 V8 (SU carbs) and as I had the use of a rather nifty Snap-On timing strobe, I thought I would check the ignition advance right through the specified rev range. It appears my old dizzy (35D8 41317B) is not advancing as much as it should (see...

Thanks Zen, sorted.....:o

Had a similar problem with my 3.5 recently, was due to ignition, have you checked what the spark is like? Sorted mine by fitting a new electronic ignition module, now runs like a dream.