sorry this is probaly not the right place to post this but I just drove my 85 iroc with 383 today for the first time since swaped it out from the wore out 305 and god I love this car but now I need gears what ratio are you guys running it is an auto with 2500 stall and a 9 bolt not sure of ratio the rear is my next project rear tire is bfg 275 65 r15

 

Need more engine details, and what you plan to do with it (street, cruise, daily driver, street/strip, etc.).

 

engine details flat top pistons world product sportsman 2 heads 64 cc lunati cam 525 lift on both sides 284 duration bowtie single plane intake speed demon 750 vacuum sec. carb headman long tube headers with mufflers only it is mostly just a cruiser and some track time we have a street legal day at the local track that is fun but nothing serious I think the 4.11s will be good becuse its not like im going to drive cross country and it has overdrive if you need to drive highway miles I just have not sat down and done the math but if I could cruis along at 75 with moderate revs I would be happy

 

9-bolt will limit your gear choices. I'd think you'd be quite happy with 3.70's, though.

 

I run a 9 bolt and have 4:10 gears. When I ordered them about 4 years ago from Miles at 9bolt.com, he had 3:70, 3:90 and 4:10 gears avail at the time.

 

I've got a 383/T-56 combo into a Strange S60 with 4.10 gears. It works really well on the street, especially at the occasional stop light gran prix.

Also, your posts would be a lot easier to read with a little punctuation.

 

thanks for the info guys. I think I will try the 4.10s .