Not Ranked
I purchased several 427 service blocks when Ford was closing these out in the 70's. The main problem I encountered was the horrible casting with too much silica which caused the blocks to fall apart around the motor mount bosses and along the side oiler system. I paid a ton to get these repaired and have stayed away from service blocks since. I'd rather pickup a used block put in 8 standard sleeves, and know I've got a tried and proven block. I am leery of the new aluminum block due to all the stories I have read about the machine problems even though the weight loss would be great.
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