[IMLost]

I,m putting a T5 into a 302 block. My bell housing measures 1" at the bolt hole location. If I use a 2" long bolt it bottoms out before it is tight. Should I have a flat and lock washer or any washers at all?
I'm afraid if I go to a 1 1/2 " bolt I won't have enough bite into the block.
Should the bolts have thread lube or locktite? Looking for opinions.
Thanks all.