"B",
Remember, I'm the guilty party as charged, for starting the sidepipe mod craze.
Tell you what, you Dyno the car now. Change the sidepipes, do NOTHING more and get back to the Dyno.
For every HP you loose, I pay for $5.00 !
For every HP you gain, your mechanic owes me $5.00
Tell your mechanic to cut the old side pipes apart and look inside. That should be all he needs to know that you are making a huge improvement.
Then once the work is done, have your mechanic re-set timing and carb. Then..back to the dyno once more.
You will be a very happy cobraphile!
DV
PS... you heard it here first: The Dyno WILL be here for the DVSF II