Re: 406 SB, Plug the steam holes??
Well.... what is the cars intended use going to be... daily driver,summer cruiser,street/strip,strip only ???
Mine is a street/strip car that sees some street cruising to the local hang-outs and to the strip,where I have made back to back full blasts down the track (6 in an hour) with no cool downs to speak of.
The reason I wrote the above is... I am running NO steam holes, NO bypass lines, NOTHING special for cooling. I do NOT overheat but has seen 200 a few times after a quick blast down the road and getting caught in traffic or a light.
I am running a 21" 3 core stock replacement radiator, a stock crank driven fan, and a fan shroud. I was told by another member or two (?) that unless its going to idle a lot in traffic they're not really needed. I did it... and all is fine on mine.
As for the machine shop wanting to do this.... If they don't will it still be warrantied ?
68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53