Difference in 3.0 and 3.2 SSI's

[James Brown]

Bolt pattern is the same, there is no sleeves on the 3.2's, they both fit, there both thick flange. So what? What makes them different and are they interchangeable?

[Scott R]

My 3.2 SSI'ss have sleeves on them, are thick flange and fit perfectly on my 3.0 L engine.

[James Brown]

So, why the different part numbers?

[Flat6pac]

Scott, they fit perfectly because theyre not the right part. The specific for the 3.6 unit is thick flange no recess. The 3.2 should fit only a 3.2 shouldnt be able to fit a 3.0.
Bruce

[James Brown]

maddening, just maddening.....

[Scott R]

I thought that as well, and went round and round with this when I bought them. The 80-83 SC head can take those sleeves, and the fit on the 3.2l heads as well. I can't speak for the earlier SC's but this was the case on mine. The part numbers on my SSI's are definitely the 3.2 SSI part numbers, I verified that though SSI in case I had to sell them.