Bear in mind that the DPO's of The Beast used bits from a number of 
different years to put it together...
Recap... Timing set, valve lash set, carburretion set, idle great but 
running cool and spitting back at steady rpm's above ~2300...
Thanks to Bill M, who generously gave me a manifold vacuum take-off 
nut, I hooked up my vacuum guage.
First thing indicated was low vacuum at idle ~14", a possible 
indication of bad timing.
I moved the distributor until vacuum was at 20" and, presto, no more 
spitting back at 2500rpm (haven't taken it higher yet!)
Checking the timing mark (a groove across the outside *not* a dimple) 
on the crankshaft pulley with the indicator on the timing chest cover 
showed that the mark was now off by ~9 degree's!!
Either this was not the original pulley or something else is wrong!!  
--
Dave G.   KK7SS
'65 MK III Sprite in Richland, WA
If I wake up in the morning, and I hurt, it means that I'm still 
alive !!
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