#41  
Old 01-31-2020, 03:37 PM
mgarblik mgarblik is offline
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The pan rail drop is 1/8" maximum. It was to allow for the slight interference fit between the block and main caps like a Chevy. That little step makes a slightly longer oil pump drive shaft necessary and possibly some very minor modifications to the oil pan/timing cover interface. If using the BOP one piece oil pan gasket, you might want to talk to them about fitment. In our case, I seal the timing cover with RTV, so no issue at all. The IA II block should fit a stock chassis same as a stock block.

  #42  
Old 01-31-2020, 08:58 PM
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77 TRASHCAN 77 TRASHCAN is offline
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In their assembly instructions they mention the oil pan situation. They said you can double up that front oil pan gasket.

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  #43  
Old 02-05-2020, 02:40 PM
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Also...I've read here, and can't find info anywhere else...The newest IAII iron blocks weigh less than the first several years production of blocks??? Supposedly close to a factory block???

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  #44  
Old 02-05-2020, 07:22 PM
Steve C. Steve C. is offline
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My first IA2 was a early block, number 17 if correct. It had a 4.310 bore and weighed about 251 pounds. My 1970 factory 400 block it replaced weighed 207 pounds, this with the block filled to the freeze plugs, SD Performance lifter bore bracing installed and all five main caps were steel Program Engineering with a ARP stud kit.

I believe Bod stated here on PY the average IA2 was about 245 pounds but I presume that was a later design block.

I'm going to edit this.... looking at my notes there is a SLIGHT chance the IA2 weight I mentioned above didn't include the main caps, but not sure. They probably weigh at least 25 lbs.
I hope Bob or someone else will chime in with their observations to help out.

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Last edited by Steve C.; 02-05-2020 at 07:35 PM.
  #45  
Old 02-06-2020, 07:59 AM
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The IAII iron blocks with caps are right around 250#.

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Old 02-06-2020, 11:49 AM
mgarblik mgarblik is offline
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Quote:
Originally Posted by AG View Post
The IAII iron blocks with caps are right around 250#.
I weighed our IA II years ago with caps on and a 4.375" bore at 247 lbs. So you are right on if you weighed it as delivered. IMO.

  #47  
Old 02-06-2020, 12:29 PM
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I have a IA-2 Iron Block (9.5 deck height and it weighs less than 250 lbs, LOL).
I have also had 3 other IA-2 iron blocks over the years and using a simple bathroom scale they all were around 250 lbs, give or take a couple of pounds, all of my blocks were at a 4.310" bore size. As Bob and Frank made changes to the block, like making the front block bulkhead thicker, the weight went up somewhat.

I like moving the aluminum block around a lot better vs the iron block, even with its 9.5" deck height.

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