![]() The tiny bores limit breathing, the small displacement limits torque. Weekend swap gets you 80 more torques for $500 instead of weeks of rebuilding a tiny-bore 305 which will never see that much torque unless you open the really big wallet. For $500 you can swap in a 350 from a TBI truck, and steal the ECM from the donor truck. I also have to point out, for the cost of boring that 305 you can find a good running 350 and skip the complete rebuild cost. You'll have to find someone to burn you a chip, which can be kind of trial-and-error. Those computers can't tolerate much change at all. Are you keeping the TBI? If so, you are incredibly limited with cams. Like the early flat-tap cams were something like 181/187 duration. I would have to look up the differences in duration and lift, but both are tiny. Plus the roller lifters are a bit more complex. Part of what makes flat tappet cams so cheap is that they're cast iron. Non-retrofit roller cam isn't that much more expensive. You can use a factory roller cam after drilling and tapping for the hold-down spider.
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