S Code 390 - practical power increase if keeping stock heads / exhaust

[Joe-JDC]

If your engine is truly a 57K mileage and never been into, then you should definitely think about changing the camshaft timing gears and chain.  You can still find C6AE-9425-H aluminum intakes and C7AE-F intakes with the thermactor tubing holes and remove about 50# from the engine.  735 cfm Holley and FPA headers, and 2 1/2" exhausts and call it good for the street.  Joe-JDC

[cheeser]

Joe,

I’ll look out for C7AE-9425-F intake if I can find one for a reasonable price.  They appear to be similar with PCV balance tube hookups as the S code intake, but tube is slightly different.

[gregb]

For me, if it was that original I wouldn't mess with it, especially if you are going to get into it in a couple years.  I'd get the carb and timing dialed in, and I'd put a decent exhaust on it, meaning some larger pipes and mufflers of your liking, with the stock exhaust manifolds.  You want it to feel more responsive put some 3.50 gears in the back and call it good until a time you want to really dig into the motor. 

[cheeser]

For me, if it was that original I wouldn't mess with it, especially if you are going to get into it in a couple years.  I'd get the carb and timing dialed in….

That was my thought for now regarding carb and timing…just getting it dialed in for now.  I may send the carb out to Air Fuel Spark for a quality rebuild, and distributor our for recurve.

I’m just gathering ideas in the event I want or need to do a quality rebuild in 1-2 yrs, and start gathering some parts.