If the 305 V6 runs good HECK YEAH I WOULD!!! These engines are great engines and anyone who says other wise is NUTS. If it has good compression and runs good then I'd keep it, BUT what Really matters is what you want out of the truck...mileage? Put an LS in there....Great torque and power...Leave the 305 in there. People dog about the 305 V6 and need to stop. I own one and am really happy with it..great engine...188,000 on it and 120 pounds in all cylinders(125 brand new). Ain't an RPM engine but will pull a heavy load without a sweat. Only reason GM quite making them was because they were to good.