No, I've heard you say that before!Not once have I said, gee I wish I wouldn't have put a Big block in my truck!
I just weighed everyone one of the new pistons with their wrist pins and they weigh 31.4 oz. I also cleaned up one of the old pistons that I already removed the rings from and weighed it with its wrist pin, it weighed 31.5 oz.
Plus a .1 of a gram is probably tighter than most machine shops can do.

Alright, short block is put together. I was thinking about this the other day, I have an ORD sbc crossmember with diy4x engine mounts. Will the big block oil pan clear the small block crossmember?
Also, do I need to get a water pump from a 90's model 454? I'll be running the kwik performance serp adapters. I know I need the long style water pump, just not sure of the year swap. And one last thing, for now, would there be any advantage to running a starter off a 90's model 454, since its smaller?
Wire wheel the old ones valves and inspect, they might need to be touched up. But if your gonna buy new valves might as well step up to the 2.19/1.88 valves.I'm running an electric fan. I actually need to upgrade to dual fans and install the BMW switch I've got, just don't have the right connector for it.
Another question, since the heads are up next to get worked on. Do I need to get new valves for these, or just re-use the old ones? They're the 781's that I got from you @nvrenuf