C&L Mass air question and compression results & question.

[Agent_4573]

Ok, so i got a C&L 76mm mass air system and I was just courious about something. How do you make the 76mm rubber connector fit onto a 65mm throttle body. It just seems kinda hard to fit something that small into something that big and not have a leak. Also i did a compression test to see if i had a bad cylinder on the left side cuz the left side o2 sensor was completely black when i switched out the exhaust and the left exhaust still smokes a little. Here are the results.
Cylinder 1: 125
Cylinder 2: 130
Cylinder 3: 130
Cylinder 4: 125
Cylinder 5: 125
Cylinder 6: 125
Cylinder 7: 125
Cylinder 8: 120

This was with turning the engine over only 3 times instead of 5 like i saw on here before, but the guy i had help me has been a mechanic for a while and he said you only need 3. I ran a thing of injector cleaner threw it not to long ago but I'll do that again to see if its a dirty injector. Besides that, what would be causing the left bank to run rich like this?(by left bank i mean cylinders 5-8) None of the spark are fouled. Ok so to get to the point, how do you fit the C&L mass air and inlet tube onto a 65mm throttle body and is it safe to put a 75 shot of nitrous on an engine with these compression results?