http://www.fordmuscleforums.com/all...rums.com/all-ford-techboard/479345-5-0-2-piece-rear-main-seal-vs-347-crank.html

 

wanting to drop in a 88 crank one piece seal in my 79 2 piece block ,"any mods to be made other than balance to the new 50oz??,,, can i just bolt in?

no problem with the swap . like you said other than the balancing . Why a 50oz. IMO , better with the 28oz cranks , way better if performance use

 

well the engine has 50oz balancer and flywheel, that is what got the crank due to previous owner not knowing, just didnt want to buy new stuff other than crank,, are you talking about big loss in power due to 50oz??

 

A 302 28oz crank will have a 2M stamped into the crank not sure what the 5.0 crank had... I'm looking for it now... just make sure you have all the matching parts it's all 28oz or 50oz... crank, flywheel/flexplate and balancer

I almost positive I but a 28oz crank in a later 5.0 block without any trouble.. I might be wrong...

Look for a date code on all the rotating parts and post them.. E0OE or something like that

 

the crank in the 79 block is a original 2ma which is a 28oz, the builder put the 50oz balancer and flywheel on and in return ruined the crank,so instead of buying new flywheel and balancer i wanted to put in a newer model crank which is 80's up which is one piece seal and 50oz balance, just wondering due to 2 piece block if the one piece newer crank will work without any modifications, thanks..

 

Try it.. One of them has a oil slinger and one don't... all that would need to be done is the oil slinger has to be ground off to make it fit.. no biggy just grind it off if it hits the block

 

so i can drop 50oz crank in and install the one piecel seal and all fits??no extra work.. will there be any issues with the one piece seal?

 

before you install the ! pc seal , Block MUST be machined for the seal OR you can use the stock 2 pc seal , no machining required in a 2pc block