I'm getting ready to drop my 70 Stage 1 motor back into the car and have a ?. Anywhere I can read about doing a homemake port and polish job on my exhaust manifolds? They sat in the trunk of the car for years before I bought it while a set of chrome headers were on the car. Also, when I get them sandblasted should I block off all the inlets? Any help would be greatly appreciated! Now if only the snow would make an exit for the year...
Steve, just gasket match the ports and enlarge the outlet to 2.25", that's about max. Just a quick port job is worth about 10hp. I'm located in Dearborn, about 30 minutes from you. Send me a PM if you have questions. There's quite a few GS's near us. Rob
Dyno results comming soon on the Tri-Shield Performance website. Testing Headers, Stock Manifolds, 2 Manifolds ported differently.......
