\'83 K5 Engine advice I've got an '83 K5 with a shot 350 and a 700R4 Trans. I'm upgrading the transmission to a 4L80-E (I’m building the transmission controller portion), and I’m not sure what route to go with the engine. My options are to rebuild the 350, or upgrade to the 454; I’m concerned with torque, but also want to watch my budget and the fuel economy. Another factor is smog – I live in California, and this blazer hasn’t passed smog for about 5 years (I’ve only owned it for two). The stock electronic carburetor and distributor were replaced with earlier models (my guess is the 350 and the fixings were pulled from the junk yard some time in it’s past). Does anyone have any suggestions as to what I’ll need to do to get either the 350 or the 454 to pass smog? If you’re curious, my long-term plans for this Blazer include adding a Gear Vendor’s overdrive unit to the back of the transfer case, offering 8 forward gears (in 2WD), all with a programmable shifter, or using steering-wheel mounted paddles. There will also be an on-board computer that will control much of the functionality of the vehicle.