I had to make a hole in mine. They look good but are a little bit taller than the stock valve covers. Be careful when installing the upper manifold or they will crack. I ended up taking them off because I cracked one when torquing it down.
I have the Moroso trick rear coils. On the street, it is barely noticeable. However, with the slicks on they will squat. On regular tires you really can't tell the difference with normal driving.
Get the blower and then run a small shot of NOS. Now you have both. The small shot will act like an intercooler. Don't get crazy with the NOS or KABOOM!
That use to happen to me often but it was because the tps was not connected and my check engine light was on. I reconnected the tps and had my computer reflashed. It's been several weeks now with no problems.
Sounds to me you might be in for a new clutch soon. Look at the heavy duty ones if you like to powershift like I do. I toasted my clutch powershifting at 6800 rpms.