Engine in my 90 K5 is on it's last legs, note that it's my DD so I'm nursing it along right now... In the meantime I have been picking up parts for a new motor to swap in. Engine is a 350 Vin code K. I want to build basically a direct swap motor, something that won't freak out the computer and will pass emissions sniffer test. So far I have a rebuilt set of heads (duplicates to what are on the truck now). Picking up a 30 over block, duplicate of whats in it now (87-95 one piece rear main, VIN K block). Now for the questions... 1) What compression ration can I run and not freak the computer (ie: what's the stock compression for a 1990 Vin K 350) 2) Like to upgrade/replace some of the stuff and do the following replace the TBI with an aftermarket Holley TBI, Edelbrock Performer TBI intake, Performer Cam, Headers into a 3" single exhaust through a 3" high flow cat. Is this feasible while maintaining the computer and passing emissions?