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You could just go find some closed chamber 516 or the even better 915 head if you're looking to keep your project cheap.
Fixed. Just in case anyone comes researching thru this thread at a later date...
Well i'll be humdinger...whoops! my bad. I am glad you caught that!
I fixed my post too, but yes kb 162's some meat off of the block, and worked 516's with a decent cam will get you 400 hp which is what the OP is after. I also receomend a full point more if going to edelbrock in which case different pistons are the better route.
'73 GK6 Challenger Rallye - 340 4-Speed
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