I went with the XE block since I plan to road race the car. The Boss block 4 bolt main would be my next choice.
My 2 cents ... Ive owned a couple 351C as a young guy and pushed them real hard and I cant say they blew up any easier then any other Ford Motor. Not sure I see all the Hiep on weak 351C blocks.
But I would go with Dan's advise.
Ron
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