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the grinding and polishing I think is better because the paint retains heat.

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R-blocks come painted in the valley

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I just knock off the big stuff with a die grinder..
then paint the inside(usually just paint the valley)..
but thats just me

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I do it that way also.

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Thanks John I will be watching for them. Jim

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Not done yet Jim But the block now has enough clearance for 5 pairs of 828-16 comp cams roller lifters. If I didn't have so many old style 360 blocks I would probably switch over to the magnum blocks as they probably require less grinding for roller lifters. On the bottom you will see some of the edges I don't like and how I have started to radius them. Time consuming work and not really necessary for most builds but what the heck its Winter. LOL

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I had mine "shot rolled". After hot tank, the block is put in a drum full of shot and rolled. Cleans up burrs and minor casting issues and leaves surfaces clean. Worth every bit of the $75 it cost.

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Not done yet Jim But the block now has enough clearance for 5 pairs of 828-16 comp cams roller lifters. If I didn't have so many old style 360 blocks I would probably switch over to the magnum blocks as they probably require less grinding for roller lifters. On the bottom you will see some of the edges I don't like and how I have started to radius them. Time consuming work and not really necessary for most builds but what the heck its Winter. LOL

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Not done yet Jim But the block now has enough clearance for 5 pairs of 828-16 comp cams roller lifters. If I didn't have so many old style 360 blocks I would probably switch over to the magnum blocks as they probably require less grinding for roller lifters. On the bottom you will see some of the edges I don't like and how I have started to radius them. Time consuming work and not really necessary for most builds but what the heck its Winter. LOL

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Hey John, what kind of grinder attachments are you using? I got one of those flex shaft grinders (Dumore) you suggested on the deburring thread I started. Looked at some 1/8" shanks carbide burr sets online. Any suggestions?

Got my own block back from the machine shop the other day, going to start smoothing edges before assembly.

Greg

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I use the same stuff I port heads with.. my elec die
grinder(1/4" shank bit.. usually the tear drop) or
my 1/4" air die grinder.. same bits.. that way I can
lean on it a bit to do some eating and get it done
quickly... I do it mainly so I get the sharp edges
and help the oil return... once I get that done I
glue(JB Weld) in screen over the center and back wall
of my SBs.. just so parts cant get down there

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Not done yet Jim But the block now has enough clearance for 5 pairs of 828-16 comp cams roller lifters. If I didn't have so many old style 360 blocks I would probably switch over to the magnum blocks as they probably require less grinding for roller lifters. On the bottom you will see some of the edges I don't like and how I have started to radius them. Time consuming work and not really necessary for most builds but what the heck its Winter. LOL

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Hey John, what kind of grinder attachments are you using? I got one of those flex shaft grinders (Dumore) you suggested on the deburring thread I started. Looked at some 1/8" shanks carbide burr sets online. Any suggestions?

Got my own block back from the machine shop the other day, going to start smoothing edges before assembly.

Greg

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Like Mike said I use the same Foredom grinder that I use for porting heads. Tear (tree) shaped ones, round ball, and cylindrical. I always stick with the 1/4 inch shaft stuff and always with my foot peddle to keep the speed down. TO east to bend that 1/8 shaft stuff.

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Sorry to hijack the thread but what are you guys using to paint the lifter valley? I saw they make some expensive paint made just for that application and I don't mind spending the money if its necessary but if I can find something that works just as good for less that's always good lol.

Thanks

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Sorry to hijack the thread but what are you guys using to paint the lifter valley? I saw they make some expensive paint made just for that application and I don't mind spending the money if its necessary but if I can find something that works just as good for less that's always good lol.

Thanks

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John. thanks for the pics. Looks like I need to get busy with the grinder. Jim

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Don't have to go crazy.