'75 318 exhaust help

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Woody'sScamp

Woody'sScamp

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I want to add dual exhaust to my '75 318 Scamp Brougham. I found a system from TTI but I am unsure about my casting numbers on my current manifolds. I am going to take them off and check them soon. I've been looking on e-bay at 340 manifolds. According to the posted 340 casting numbers on this page, if I'm correct, there are only two numbers to look for on each side.
Drivers
 
Sorry, don't know what I did. Here's the rest.

Drivers 2863553, 3614368 ??
Pass 2863549, 3418623 ??

This is all I should be looking for?
 
Yes, there is one number on each manifold but you didn't say if you were looking for the large hole manifolds or the smaller (70s) 340 manifolds. I sell both.

treblig
 
There are other options that might save you some money. The 553 is typically very expensive. I sell the driver's 368 manifold (large hole) paired with a 360 magnum passenger's manifold (large hole) which saves you money but gives you the same performance. I have a few 623 (smaller 340 manifold) which I sell at a very good price also. The 549 is also very pricey.

treblig
 
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Treblig, then you are the man to talk to. I guess for me larger would be better! I mean, my 318, with all the pollution crap on it, was only rated at 145HP. Car is not even on the road yet, but starts every time and runs good. The exhaust is going to be my winter project. One of my goals is getting the HP up a little bit ( maybe 200- 225?), but still trying to stay drivable. I eventually want to put a different intake & 4 bbl carb on it, (like H22's thread, '75 Scamp) but after reading all the threads about A-BODY header hassles, I'm not ready for that yet. I'm a rookie and just want bolt on parts for now, until I learn more. Everything on this car is stock. Will large hole 340 manifolds work and just bolt on to my stock heads? It needs a new exhaust system anyways. It's a 904 trans, with 2.45 gears in the rear, so it's just going to be a cruiser. It's even got the fuel pacer light on the fender. Remember the oil crisis and need to increased gas mileage? I was 17 in '75, just missed all the good cars. I'm greedy, I just want it to sound like more! I'll have extra cash in about 6-7 weeks, (Bonus!). Thanks & please PM me with a price, if your manifolds will work for me.
 
You just missed all the good cars but in the 70s all the best cars (from the 60s and early 70s) were super cheap!! In '75 bought a 1970 factory mint green 340 6pack Challenger (26,000 miles) with the factory glitter shaker hood for only $3000. The old man that bought the car brand new didn't like having so much power. I wish I still had that car, it was like brand new and ran like a r@ped ape!!
Pm sent.

Treblig
 
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