I am currently running an electrical fuel pump, but considering switching to original style mech pump on Chevy 250. I'd like to hear pros and cons from the many experts resident here. On another site I saw reference to a spacer between the block and the pump. Also talk of whether or not there is a pushrod which rides on the cam lobe to actuate the pump, or if the pump arm rides directly on the cam. Thanks for any info you experts can provide.
