[racerboy]

I started another thread about possibly having to pull the RA III out of my '70 T/A for a rod/piston whap because I think the rebuild on that motor used flat-top pistons and with the #12 heads, I am getting a lot of pinging even though I only run 93-octane gas. Anyway, while that process starts to play out, I don't want to not have the T/A to drive this summer so was considering dropping in a 428 that's sitting under my bench that probably only hsa 10,000 miles on it since a rebuild back in 2002. That engine has 670 heads on it now, which I know is too high, so was thinking what would be the easiest and least expensive ways to keep the T/A on the road while the 400 gets massaged. I'm not really interested in going the aluminum head route, so was considering finding a set of larger -cc heads for the 428. Would the 6X-4 be a good choice? I see these come up on eBay from time to time and I know a lot of guys like these for the 455 builds. What about the 1970 #64 heads?