I know the Vega well..i also Know Kenny the seller very well also..he worked 5 blocks from my old house and shop and we would do buiness and he would visit the shop very often..
i have made passes beside this Vega in my wifes 69 camaro last year..
i believe Kenny had an almost stock 454 cast heads (oval port) pump gas and he would still run the lower 6 second range beacuse the car was so light..
i know you have a stout little 406ci...its making much more HP than that Big block keeny had in the vega plus you will shed a few hundred pounds off the nose..
so you should step up into the high 5 second range....be cautious take your time and feel the car and work you way into it...contrary to some beleifs there is a BIG difference in how you drive and react from a 6.90 car to a 5.90 car... everything happens so much quicker...
ps..change them valve springs this year....lol 8)
congrats and goods luck my old buddy.
Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "