You can probably find another cheap stock intake to modify, put the original aside. I have 2 1970 455 intakes in the basement collecting dust. You will want to find one locally, as shipping will kill most long distance deals. Or consider , if you are going to spend the time modifying a heavy stock intake, why not save the time, install an aftermarket aluminum intake , gain performance and remove a chunk of weight off the nose? Players choice. JIM/Rott
There are other cam suppliers but, TA Performance is one of the most respected. You can call them and they will try to recommend one to fit your goals. The 212 or the 284 might work well for your mild build. Here are the 455 cams they offer: http://www.taperformance.com/products.asp?cat=160
You can get most of that gain rather than grinding from running a 1/2 to 1" open spacer. Or a 1/2 and a 1/4 if space is tight. If you already did the grinding, a 4 hole 1/2 with that would be the ticket based on testing I did years ago.
How can you go from a Quadrajet to open spacer and back to a 4 hole intake as in the first paragraph?
