I have your mentioned add-on's as well as doing 103" bore and 255 cams installed. I couldn't be happier with the performance improvement. i spent $2700 for engine work and parts, rush slipons, tuner, se air intake.. I'm wishing I would've had SE performance heads installed as well but the totally was rapidly rising and I didn't want to add $1200 to the tally.
You can save some cash by having your cylinders sent off to be bored rather than buying kit..
