wanted to see if anyone has any advice tips or comments on my exhaust setup? I am in the process of installing my new 406 into my 87 camaro and wanted to know if exhaust should be alright. I am going to be running a 650 holley dbl pumper on this. but it has hedman lt 1 5/8 to 3" and I am wanting to run true dual exhaust. is there any known problems with this or should I use bigger headers (primaries anyway) 406 has bowtie heads and air gap intake. 10.14 compression. any advice is helpful. Thanks

 

Not knowing your cam, it sounds like you're marginal with 1-5/8" primaries.

 

If it's a wild motor I would go with larger primaries. I have 1.75 SLP headers for my car

 

oh yeah cam is hyd. flat tappet. .480/.480 duration at .50 is .230/.230 advertised duration is 292/292. lobe seperation is 109.