Today, dollar for dollar, is the 318 faster than the 340 ???
My points above of the Maverick with the 300 bored and stroked is loosly about the way he was SLAMMED by the 351 guys on the Dorf forums. They said his 300 was a pig truck engine and would not get out of its own shadow. But when he showed the Dyno sheets running over 20 PSI and 520ish HP they still hammered him, just a bit less. He ran around 12 PSI only to keep the head glued down.
I'm almost sure a stock junkyard 318 with a Turbo pushing 14.5 PSI would kick out 460 Crank HP for a short time. SHORT is the key word there. It would fail when the top ring ends butted and cracks the ring land off and a Grenade goes off in the Dyno room.