Hey, just got my engine done a couple of weeks back.. It is now completely broken in, but it seems to be lacking a LOT of power in the low end. When i get up to about 70mph it just flies, but it doesn't have the low end torque that it should. I am using the air cleaner that the car came with (very,very sh!tty 2" cleaner, im sure it has close to no air flow) and the stock sh!tty exhaust beside some cheap-a$$ headers (the $70 specials in jegs - came with the car) And i am also using the carb that came with the car -a 625cfm Carter AFB, which is also a piece of junk (never taken care of by other owners)

I am planning on putting a 14x3" K&N Filter with an Xstream top, a 670cfm Holley Street Avenger Carb, and redoing the exhaust. I am planning on getting Hooker or Headman Longtube headers and either a mandral bent 3" flowmaster exhaust system or copying cobrakiller1989's oval exhaust system https://www.thirdgen.org/techbb2/sho...hreadid=242121 save different mufflers.

I have a 355. 11 to 1 pistons with 76cc combustion chambers (something like 9.8 to 1 compression). An Elgin cam that is a copy of the 60's 327/350HP cam. I have a motorsports intake manifold (basically a copy of the Edelbrock performer RPM) and High performance HEI Distributor with Taylor wires and NGK plugs.

Will the changes in the exhaust and air/fuel delivery make a big difference in the powerless feeling that i get in my low end?

Also, some exhaust questions: This is my daily driver so i do need some ground clearance.. with the longtube headers totally kill all clearance or will i only lose a couple of inches?

Also, cobrakiller1989's oval system doesn't have tailpipes.. is there a way i can get a 2.5" over the driver's side axel? could i do some fabrication to the body (aka POUNDING) to get it to fit with no problems while driving? or am i pretty much stuck on having the mufflers dump in front of the axel? and if i have to do that, are there any major problems or hazzards?

Thanx a lot for helping out.. I'm getting about $1600 in 3 weeks and $800 of it is set for exhaust.. tho i am going to see if i can get some used longtube headers and get them ceramic coated.

Sorry for the longer post