just bought a 86 camaro swapped tpi 305 for a carb 350, guy had it running so he says, had a cam swap it ran then shut off, cranks very very slow, so new battery was put in. i pulled the distributor put it on #1 tdc put it back in, still cranks slow pulled all plugs still slow, so app its something in the motor. any ideas on what it could be? bad bearing, cam, both who knows any info guys thanks!