Yes I wrote the article, but it was in 1999 – before I knew better. I built a new exhaust then, with the “tulip petal” shape, but I did not realise the engine was also a bit fatter (someone said 1 more millimeter in diameter).
As to the 10, be careful, there is a 10R (visually a III/6N/6R with JT8D’s) and a 10B, a completely different machine, longer fuselage, kinked wings, enlarged empennage and JT8Ds (to name only a few differences).
Cheers,
Laurent
LBG
So many planes, so little time ...