Building up my 68 340

txbullets said

I have read the dyno derby article and it said 392hp. Pretty much identical to what I plan to do. Have others had similar experience? I have decided I would really like to be close to 400hp if it is easily achievable while we have the motor apart. How much difference would a bigger cam add?

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Don't believe everything you read about HP... Without porting the stock heads will get you in the 340-350 range. If you build that exact engine expecting it to push your car to a high 11- 12.00 second time slip like it should, you'll likely be disappointed.

That mag build will get you in the 105 range for 1/4 mile MPH