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Absolutely...This motor came out of the factory with 240 bhp because the valves are smaller than the earlier 340's and the compression ratio was lowered to 8.5/1 versus the 10.4/1 in the earlier cars. If you were to do headers, an unsilenced air cleaner and a cam that has about a .500 lift, you should be able to get the 73 motor back up to the 71 specs (about 270-275 bhp) If you want big power, you would want to mill the "J" heads that you have and do 2.02-1.80 valves. Getting 10/1 TRW dome top pistons or shaving the heads while the valve seats are being ground would make it 300+ bhp easy.

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Q: Will changing the cam on a 1973 340 give you more horsepower?
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