Finally started to get into the tuning stages on this motor, and it's falling a bit short..pulls hard up to about 4000, and then it's like hitting a smooth rev limiter, which though I have my shift lite currently triggering at 3800, actually is pretty handy to keep from over revving it during break in.
On the other hand, I also realized I have a partially smashed exhaust pipe about a foot off the manifold, which can definitely cause some issues too, and I figure until I get that fixed early next year, there's not much point in wondering whether the limiter is in the carb or the heads. I was hoping to wait until after I get the headers built, and do it just once, but I don't want to see it sitting in the garage for another few months either, and I'm not likely to even start fabricating until the weather warms up at least into the 70s during the day.
Haven't gotten into tuning the carb either, other than setting idle speeds and mix screws. At an idle timing of 36* (16 initial, 20 vacuum), it's pulling about 12" vacuum, which is actually far better than what I was expecting given the cam that's in the motor, and enough to run the power brakes. I can feel that they're not quite as strong as they were with the old motor, but still plenty enough to haul this heavy beast down.
All told though, I'm pretty happy with the way this hodge podge mix up of parts turned out so far. Kept having nightmares that I was going to get it fired up, and find it sounding like crap and performing worse than the 350 that came out. It's no 500hp monster, but it definitely scoots along just fine for me, and I have a decent base to slap a better set of heads on later