rklessdriver wrote:
Yes it effects the top end. An unlocked TQ Converter eats MPH over a locked one. I would expect the car to mph better with the TQ Converter locked up.

As long as both passes we are compairng here were w/unlocked TQ Converter - The comparison and my opinion is still vaild.

Your running 1 5/8" long tube headers?? If so - I wouldn't expect to see any gain on a 350 inch motor by going to 1 3/4".
Will