I used the best gasket 3675 seal on my 52. It had the two piece rope style in your last post. I was changing the clutch had the flywheel out, making this easier to get at everything. I lowered the crank by loosening all the main caps and completely removing the rear main cap. I cleaned the main cap thoroughly and flushed out the recess in the block with carb cleaner. I filled the two large back drain holes in the main cap with jb weld, allowed it to cure overnight. Cleaned the pan thoroughly and straightened the pan rail. I coated the back side of the upper seal using permatex number 2 and slid it into place, similarly coated the lower seal and slid it into place in the cap. Best recommended there be no sealant on the butt ends of the seal. I applied a small amount of black silicone on the cap metal to metal surfaces and sent it home. NO leaks, zero. Many others have done this and have had leaks. Not sure what the difference is in what I did vs. others. Best of luck to you with however you decide to go.