Building a new 505 With Callies / Mopar Performance Block

Andy
I am going to measure the piston to deck clearance to verify compression ratio this week. When the block was machined and the deck height verified at 10.72", I left the deck height at 10.72. That puts the compression ratio at 12.3-1 with an .039 gasket.
The headers are going to be custom made I was planning on a 2" to 2 1/8" step headers with a 4" collector. I am hoping we can get the tubes all equal length at 32". I am planning to dyno the motor but after the headers are built, I would like to use my headers for the car on the dyno if possible.
I am going to degree the cam hopefully next week so I can check the valve to piston clearance. I have Harland Sharp rockers that are 1.5 ratio right now for the mockup test. Then I can go from there. Lack of parts availability has been a stumbling block so far. Hopefully I will be posting some pictures and status updates in the next couple of weeks. Thanks for the help.
Look at Vizard's video on proper tube lengths. Don't sweat the lengths being equal so much you sweat having gentle radius, also sweat the order the tubes are in the collector. Depending on the underhood room available, you could probably just do 2.125 into a 3.5" collector until 900HP. ALSO sweat that S.plug access is easy!

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