Okay, the various answers to my questions may appear in other posts but I've done some searching and only ended up crosseyed and with a headache trying to sort it all out. So please forgive me if I am asking something that has, in one way or another, been answered before. /forums/images/graemlins/grin.gif I am preparing to pull the 305 SBC engine out of my 1985 K5 Blazer and will replace it with a 350 GM crate engine. The 305 obviously has the A.I.R. system and other smog crap all over it. I want to get rid of that stuff, retain the catalytic converter for emissions testing reasons, and basically reduce the clutter in my engine bay. I have an Edelbrock Performer RPM dual-plane non-EGR intake. I will be buying an Edelbrock #1406 Performer non-EGR carburetor with electric choke. I will most likely be replacing the factory exhaust manifolds with something that does not have all of the AIR plumbing hanging off of them. I am open to suggestions as to which headers to use. Prefer shorties so that I don't have to do any custom exhaust fabrication, but can resign myself to using long tubes. /forums/images/graemlins/wink.gif My questions are simple: If I do all of this, can I chuck the big air cleaner assembly with the heat riser and other extraneous garbage and just run a simple open element air cleaner? I presume that there is at least one smog pump on the 305 somewhere. I admit that I haven't done much crawling around in the engine bay yet because the temperatures outside have been in the teens or single digits and I haven't been able to muster up the willpower to go do it. Is there just one smog pump or more than one on the 305? If I chuck these, I presume that I must use shorter V-Belts ... correct? Finally, it's my understanding that there isn't an ECM computer on these 1985 rigs, so I won't have to worry about all of these changes mucking up a computer or anything like that. I rather doubt it even has 02 sensors, but I may be wrong. Am I right on both of these points? Thanks. Just trying to do some homework and eliminate any surprises when I get ready to tear into this engine swap.