Goes to a model show wearing Mopar racing shirt, buys Mopar 1:1 parts and a Mopar kit, mission successful. I was actually able to depress one of the valve springs fairly easily, so I think I'll be alright.
1971 340 J Code heads will be hot tanked and disassembled then sent to my machinist who will Magnuflux them among other things. Couldn't resist the '69 GTX for $7 Sealed inside.
That's a good score! I have a set of J heads on my Duster, they flow pretty good! I recently found a 340 left at a local machine shop over 2 years ago and the guy never came back, i might be able to get it for almost nothing very soon!