I bought a set of Doug's 1 7/8 primary long tubes for the cutlass, and attempted to install them yesterday. The driver side required flattening the seam on the firewall, and removing the steering shaft to get it wiggled in, but that's about it. The passenger side is a train wreck. I wasn't surprised at needing to clearance for the rearward most ear of the upper control arm, but the #5 tube dives down straight into the frame. I beat and banged and got the torch and after hours, it still needs to move over half an inch. For the tube to be perfectly round, it needs to move well over an inch inboard. Has anyone else encountered this problem? The engine is sitting on TA mounts, and I have a G Force trans cross member in the car. The manifolds sure fit perfect.