i am building a 455 for bracket racing.i know the engine`s history for 15 year`s back.only about 8-10,000 miles on rebuild,.30 over,10-10 crank bronze valve guides.i am using a performer intake and want it to idle ROUGH.with a stock head,what spec`s do i use for the cam selection?i have done some research on this and other site`s and have found that i have a really good engine combo,since it`s a 69 model with c heads.i also need to know what oil restrictions to make.

 

search the threads under big blocks. There are severl builds in progress and information on cams and oil restrictions. Also check general discussions there is information cross over in these areas.Good luck on you build. I am just about done with mine

 

Not to be sarcasatic, but...wouldnt you rather the engine run good and make HP instead of having just a Rough idle?.....All things need consideration before you choose a cam. To simply install a big cam without beefing up internals, oiling system, rear and gears, trans and converter your on the wrong path. You will have a 455 turd that sounds mean at idle but falls on its face when you try to go. Search past posts as already suggested.

 

You could always use a stock cam and turn the idle speed way down to get that "rough idle" feel.