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Hello all, I am going to exhaust headers with 3 inch collectors on my 383. I've seen some set ups go from a 3inch collectors down to 2-1/2 inch exhaust lines, and I've seen 3inch lines come off 3inch collectors. It seems to me that, if the collectors are 3inch, the rest of the exhaust should...

I have a 68 Road Runner 383, and just changed out the Carter AVS carb. The choke was working fine before I changed out the carb, but now it comes on while driving. Everything else seems fine. Any suggestions? Thanks! UPDATE: I tinkered a bit, and found that the choke was NOT the...

Hi All, I am currently planning out an engine teardown, including mods for reliability and modernization. Any suggestions past hardened valve seats and upgraded modern seals would be welcome. I would like to keep the engine looking stock when it all goes back together, but that limits my...

I went out to check the numbers on a recent purchase, my 1968 Road Runner. The good news is I found the HP on the 383 engine block, which told me that it is a High Performance Engine, and not a regular 383. I had to do some minor sanding, but I was able to uncover the last three numbers on...

I used an online decoder to get a lot of information out of my 1968 Road Runner fender tag. The fender tag sequential numbers match the trunk numbers, and the fender tag is consistent with the VIN RM21H8G21XXXX. There are a few unknowns, however. The decoder came up with no known code of B8...

I just bought my first Mopar, a 1968 Road Runner, and it looks like it needs a new carb. I want to stick with the Carter 4bbl. Any suggestions regarding where to buy it? I've found several suppliers, including Rock Auto and Classic Industries. Also, what does AVS or AFB mean? I am...