Nice!! take a pic of the hood before you paint it so when guys come up to you and tell you your hood is wrong because its missing the thin border on the blackout you can prove them wrong. Looks like a few demons came through that way whats the build date on the car?? Also try to save the...
I wouldn't open the 273 up yet, if it was idled around by a retired couple, and not many miles put on it in the last few years it may just have a stuck ring or two. maybe do a oil change with some rotella 15w /40 and add a quart of marvel mystery oil to the oil and some to the fuel and take her...
i would let it leak until you get several more hours of run time, best way to break it in would be to drive it under load, giving short full throttle, in high gear, from idle to 4k or so. i would still double check your pvc system & breather.
If its all working, you have a problem with the rings seating, did you use low tention rings? are you using synthetic oil/ did you use syn oil during break-in?
I can tell you the factory tach is very rare, Nice color, you will love how it drives compared to the B-bodys, I have a 68 RR its like being at sea when i drive it.