I don't know how yenko could get a 427 coversion over the border without emmissions tests, but maybe a stormer which apparently mo had in that city chevy ad just posted, and raced acouple of times on both sides of border.Then again harrell did conversions for yenko that never saw pennsylvania and don billed harrell and it went out to dealer as his own like gary's, I suppose he might have used gorries to pump out some on that side of border and maybe bill the same way or take panthers as trades, maybe that's where some of the weird vins come from on the 107 lsit maybe some were early 327 panther conversions, they did say they made about 50, add that to 54 and you get real close to 107 or 106 w/ 1 duplicate #..