low 10's is not on a budget 400, 900 wont cover much at all, maybe valvetrain. it takes a close amout of money invested in that motor to make similar built motors(ie 355, 383) to run 10's as well, also chevy 400 or pontiac? thers ALOT to learn about engines before you up and decide a swap liek this. If you want a bigger engine really, do a 350, common swap, cheapest parts, thats what id recommend IMO.
btw, leighbor = Labor
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