so we just got my buddies 327 into his regal tonight. it is a fresh 4 bolt main block, 60 over, flat top speed pro pistons, energizer cam, double roller..... anyways we just got it all back together and installed in his regal, [problem is that we have no compression. when it cranks it seems like it is not getting any compression because it sounds a little funny and seemed like there was not enough resistance not to mention it will not start. i am thinking that we did not get the timing chain properly aligned?? is there anything else that would cause this?? we double checked the timing marks before we finished assembling the motor but is it possible that we got them off?? is it possible to be 180 degrees off? it has literally zero compression according to our compression gauge. so tea, we are pretty much stumped right now! any ideas or suggestions please???