Cracked 502 block

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06-06-2019, 04:56 PM

#11

Camalot

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A mark iv crank will work in a gen 6 block but you will have to convert to a two piece rear seal, mark 4 cam will not fit/work in a Gen 6 pistons and rods are all interchangeable as well as the heads. Flat lifters will work but don,t make much sense to use them when it's made for rollers. Oil pans are not interchangeable along with the timing chain and sprockets.

Last edited by Camalot; 06-07-2019 at 04:22 AM.

06-06-2019, 11:30 PM

#12

mike tkach

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Quote:

Originally Posted by Camalot

A mark v crank will work in a gen 6 block but you will have to convert to a two piece rear seal, mark 4 cam will not fit/work in a Gen 6 pistons and rods are all interchangeable as well as the heads. Flat lifters will work but don,t make much sense to use them when it's made for rollers. Oil pans are not interchangeable along with the timing chain and sprockets.

there is no such thing as a mark v block,their is mark iv,gen 5 and gen 6.both gen 5 and gen 6 use a one piece rear main seal.gen 6 is the only one that comes with a step nose cam but all big blocks can be used with a step nose cam.the cam from the gen 5 can be used in a gen 6 block.the gen 5 heads will work on the gen 6 block.

06-07-2019, 04:24 AM

#13

Camalot

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Quote:

Originally Posted by mike tkach

Thanks for picking up on the typo I've now corrected it to IV and not V

06-11-2019, 02:31 AM

#14

propilot

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Thanks to every one, I am now looking at dart and world product blocks. for more strength for about the same price. I will let you know what I come up with,

06-11-2019, 08:11 AM

#15

mike tkach

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imo the dart block is the best.

06-11-2019, 08:20 AM

#16

F-2 Speedy

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Quote:

Originally Posted by mike tkach

imo the dart block is the best.

agree, and make sure you check the lifter bores...........

06-12-2019, 10:08 PM

#17

larose481

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Also don't overlook the Brodix iron blocks.

06-13-2019, 03:00 PM

#18

propilot

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Quote:

Originally Posted by F-2 Speedy

agree, and make sure you check the lifter bores...........

so what do I need to look at the lifter bores?

06-13-2019, 04:38 PM

#19

ph1971

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You will need to check and double check every machined surface no matter what block you choose. You need a good machine shop and some accurate measuring tools to end up with anything worth your time. I also prefer the Dart big M

06-14-2019, 12:03 AM

#20

mike tkach

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Quote:

Originally Posted by propilot

so what do I need to look at the lifter bores?

dart leaves the lifter bores a little small so the builder can size them to their lifter of choice.dart puts this information in the paperwork that comes with every big m block.