Originally Posted By: Whitedog
On another note, how much aftermarket does there need to be?


If EFI is maintained, the head even with the stock valve sizes can be reworked to even the flow balance out. With Kooks making headers (I asked they will sell them without the 2:1 Y merge and cat - so folks can run true duals), the only real parts missing are camshafts.

Peel the insulation off of the stock intake and paint it. If it really does not work for you flanges are available to roll your own.

If EFI is not your game then get Jerry's distributor conversion and build a carb intake. The engine runs quite well with out the VVT - retarding the exhaust cam 1 tooth (7*) helps on the top end if the VVT is not used.

After you work on this engine for a while, its really no harder than say a 292 - in some areas its easier - no pressed on cam gears to deal with.

It is different - yes but so was the change over from flathead to OHV engines.


Last edited by efi-diy; 01/23/13 04:39 AM.

51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them