is there really no replacement for displacement?...

When I changed my exhaust and put a good 390 on my 170/ it run's much better. hills don't bother it and she likes 65 and 70 mph now :happy10:
Bone stock 170/ 2 to 1 exhaust 2'' to the tail shaft then 2 1/4 with a very quit muffler for some back pressure and run's a 12.07 1/8 mile and my daily driver getting 27 mpg on the hwy, switching to 14'' and removed the 13'' helped I am sure
I know it is no power house but it sure eat's up the first 60' for a granny numbers matching A body, I know this engine will give me many great miles and it will always have one in it, I think 8) :happy10: Just had to share and yes =P~ you can not here it running down the road :happy10: Nice and quite and light.