I have an LO 3 motor and am changing motors. I will be putting in a 350 with the following:HD valves/springs, weiand manifold, edelbrock 600 cfm carb, Comp Cams Magnum 306 cam, 11.0:1 pistons, 3000 stall torque convertor, and 3.73 rear with posi and MT 26x 11.50 slicks. What kind of qtr and MPH shoul d I expect to see next season?

 

Low 13's, high 12's is my guess. Try the motor swap board. They would know for sure since they have probably done a swap similar to yours and would be able to tell you. But that is my guess.

------------------
Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-Accel Cap & Rotor-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone
http://members.aol.com/j007golden/91firebird.html

 

It all depends on the heads, you could run as slow as mid 14's with some 882 with stock valves. Or as fast as 12's with some TFS, AFR, IRon eagles, etc. It's all in the heads. And the compression is a little high especially with a carb if you plan on running pump gas. Try 9.5to 1 with iron heads or 10to 1 with aluminum on 92octane. And a bigger carb, this car will not be as reliable or drivable compared to you stock engine also. Upgrade your radiator and water pump, don't run UD pulleys.