Thoughts on a 390 cu in. stroker from a 318?

Anyone remember HotRodDave40 on Moparts? He was a local friend here until he moved to Montana. He built a 318, actually 2 of them. First one he bored it out further than the casting would allow he crack a couple of cylinder walls. He didn't have all the cylinders checked. It was a weird combo. 273 2bbl cam. Magnum heads, Edelbrock LD340 850TQ 10:1+ compression straight headers with exhaust running out to the rear on his '69 Barracuda coupe. He built it to run E85. Got 29.5mpg on the highway and would spank 5.0 mustangs hard. I'm trying to remember if he had a stroker crank in it. IIRC he was in the lower 400's for displacement.