EBAY is down........so I cannot say anything about your choices.
The truck rods are heavy and junk. I built a big inch BBC 30 years ago using a TallDeck block. The deck is .440 taller than the standard BBC.
You will need spacer plates for the differences between the intake and the heads. I made mine.....they are available from suppliers now. You need a special distributor with a sliding collar......the stock distributor will not work.........you can trim some off the distributor and mill some off the intake where the distributor goes..........but another distributor is BEST.
Longer push rods are also needed.
Balancing is also expensive.........Mallory metal........the long stroke and the weight of all that rotating mass is heavy.....
You can GO FASTER for a lot less money .....IMHO
30 years ago 496 was HUGE..........
a GM crate 502 will work as good or better ....for less.......
