You have the problems and solution back ass wards, the World blocks were made by World Corp. and sold by Mopar after Mopar dumping the problem prone Mega blocks scope
I've built both and the World blocks always sonic tested and machine better than the Mega blocks.
Too bad that Marty Koleno died, and his business closed up whiney His 4.500 bore high nickel cast iron wedge blocks are the best ones I've seen so far up
I'm planning on making the one I have (the block) into a supercharged 551 C.I. B1 headed high output (I'm hoping for 2000 to 2700 HP at 7600 RPM with 30Lbs.+ boost) all out E85 fuel race motor luck wrench up devil

Last edited by Cab_Burge; 12/02/22 02:36 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)