Hi! Need to replace my singel exhaust now as it has started to rust. I wounder if there is some place where you can order a complete dual exhaust to a 67' Caprice wagon? Is it the same exhaust to a Caprice HT and four-door as to the wagon? Thanks Emil
The tail pipe exit will be different, that's for sure. They need to exit at the side of the car, not at the rear under the bumper. The rest of the system is likely quite similar. My personal preference, though, is to go for a custom made dual, fitted to the car, and sized appropriately for the engine. My 351M is running dual 2 1/4 inch pipes. When i get around to duals for the Grand Marquis with the 400 big block, it will have dual 2 1/2 pipes, according to my muffler guy. It has to do with scavenging. Too big, and they don't scavenge properly, so you lose both performance and fuel economy.
Waldron's Exhaust has the patterns and data to make OEM duals for almost anything. http://waldronexhaust.com/ Yes, the wagon tailpipes have side exits.
Thanks for the tips guys! Have to make a phone call to http://waldronexhaust.com/. What headers can you suggest to my Caprice with a 327? What about these? http://www.ebay.com/itm/271120647476?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2648
Be careful about buying cheap headers - been there, done that, got the burn marks to prove it. Also be careful about buying used headers - most of them will have problems. Get headers with a thick mounting flange and make sure they're flat before you put them on - lay a straight-edge across the flange to confirm. Get some good header gaskets too. If the alternator used the exhaust manifold as a mounting point you'll need to come up with new brackets. I've used Alan Grove brackets with a lot of success - nice stuff too http://www.alangrovecomponents.com/.
I believe there should be aftermarket brackets made that allow you to retain your stock alternator location with the headers. I'm guessing you probably have A/C and p/s so relocating all of those would be quite a chore. Are you looking for long tube or shorty headers? Keep in mind if you get shorties that the down tubes from the stock exhaust will more than likely not match up with the new headers. If it were me I would look around from some of the 2-1/2" ram's horn exhaust manifolds (you should have the 2" ram's horn manifolds on there now if they are original). That is what we have on the 383 in our '67 Biscayne. They should be more than adequate for your 327, you don't have the headache of headers, and the exhaust shop should be able to make exactly what you need. I believe you can still buy them new. Make sure you get the correct driver's side manifold that has the proper mounting for the alternator. There are a couple different styles. **EDIT** I think this is what we have on the Biscayne. Notice the alternator mounting pad on the LH manifold has bolt holes facing forward. Most of the aftermarket ones you see have the alternator mounting pad on the side of the manifold. Make sure to check which one you need. I wouldn't pay attention to the price on this auction. http://www.ebay.com/itm/64-65-Chevy...Parts_Accessories&vxp=mtr&hash=item5d36b194d0 The auction gives you the two part numbers to search for. Others are 3797901 and 3814970 (I think that is the RH side that has a mount for A/C, I'm not familiar with the A/C mounting, so I have no idea how that works).
Yes I have the 2" orginal ram horns today. Since the new exhaust is going to be a 2" perhaps replacing the orignal to a 2-1/2" isn't necessary?
Well yes, if you are sticking with the stock 2" exhaust then it doesn't make any sense to upgrade the manifolds. I was under the impression you were going larger with the pipes. If you want nice stock performance then the 2" ram's horn manifolds will do just fine. They are pretty decent as far as stock manifolds go.
I highly recommend Sanderson Hot Rod Headers, they are spendy but require no gaskets and are technically tubular mainfolds. They collect high and have 1/2 inch thick flanges, the tubes pinch fit your exhaust ports and seal permenantly with no gaskets required on the head. I put mine on some 10 years ago and have had no problems at all.
