O.K. Got a start on the install today and figured afew things out.
4 of the 5 stock bolts on top (the ones inside the steel cover) are 135mm.
The odd one down front is 120mm. This makes the 5th new long bolt (155mm), too long.
However, you can re-use one of the stock long bolts here instead (gives you about 1/4inch to screw in), or do what I did and cut 1/2inch off the new long bolt. Everybody with me?
The vertical bolt all the way in the back is 100mm stock (all these bolts are the same size- thank you GM- just different lengths), but after you raise an inch, you can now use the orig. front bolt (120mm) all the way in the back.
So now you've got 6 attachment points and I think if you really wanted to, you could make a couple of brackets (think "figure 8" shape) and attach those horizontal bolts back on too!
My gasket is curing, and if the wife is still speaking to me, I'll try to confirm all this tomorrow.
Thanks Hapisok for recommending a trial fit before install
