360 Magnum building on an existing bottom end

65TTCuda said

Finally pulled the heads off my 360 magnum and the cylinders don't look to bad. No ridge and no scores on the walls. Need to clean the piston heads a little. The cam doesn't look terrible either, although it is going to be replaced. The roller lifters look really clean and in good shape also, but I'm wondering if they will hold up under a high lift cam. (.530+) Like I said before I would like to use the short block as is and put a new cam and heads on it. what do you guru's think?

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I can still see the factory hone marks in the cyl walls. 100k is nothing IF it's had any type of care at all. The roller lifters (providing they are good to start with) will be fine at .530 lift. I will bet you'll find a bad cam bearing or two. Easy to replace. Then I'd just spin the oil pump over with a drill and primer and see what pressure it has. If the pressure is good, I'd leave the bottom end alone. Throw your new cam and timing chain in it. Make sure your valve spring match the cam