Renix BT Block? Help Identify

[Huntr]

I just pulled the block from my 87 Comanche and noticed some differences between my 88 cherokee. There are multiple "BT" castings all over the block. There are also different size freeze plugs, both 1in and 2in. They are also steel plugs. Anyone seen these early "BT" blocks before? I can't find anything about them on the internet. I am looking to build a stroker out of the block so are there any major differences I need to be aware of? Is it okay to use this block in a stroker??

[Kaiserman]

No clue what the BT means, guessing it's just something AMC did for thier casting? Ill check my 87 4.0l and see if it has it. My January 89 does not. Love the AMC flag cast in. Hope my 87 has it.

[Huntr]

17 minutes ago, Kaiserman said:

No clue what the BT means, guessing it's just something AMC did for thier casting? Ill check my 87 4.0l and see if it has it. My January 89 does not. Love the AMC flag cast in. Hope my 87 has it.

Yeah it's pretty cool I just don't know if there are any significant changes in the block like how the freeze plugs are different. Since I'm going to stroke it I'm wondering if the dimensions are all the same on the deck height and bore. Interesting at how many variations there are over the years of this engine!

[cruiser54]

contact Chad at Golen Engines. He'll likely know.

 

[Huntr]

On 5/17/2021 at 7:05 AM, cruiser54 said:

contact Chad at Golen Engines. He'll likely know.

 

 

I'll try that out. Thanks!

[fiatslug87]

15 hours ago, Huntr said:

 

I'll try that out. Thanks!

Please let us know what you find out.