I swapped an E303 for a TFS stage 2 cam. I'm also insane enough to say that I'd do it again. With 3.55s in back, 280 Hp and 320 Ft/lbs at the tires, she bucked like a bronco with the E cam. Especially cold. Then I changed a lot. Went through a guy named Shannon who I think owns Western Motorsports in Alberta. He recommended the TFS stage 2 with the 331 I was buying. I don't remember his reasons, might have been price, But it's in my car and it's way better on the street. I also put 4.30s out back with a z-spec t-5. I know the motor is different and the gears are way different so it's not apples to apples but it's my car's history. The 331 is low comp and not boosted yet so it only makes about 300 of each at the tires which is close to the first setup. I love those gears and that tranny though. Powershift second gear at 4000 or better and listen to those tires burn until I get a good hard chirp in third. She'll idle around pretty nice too. It probably comes down to cash though. The TFS was a good price and I'm a bargain shopper. It's what the fox cars offered the most of back in the day. Bang for your buck.