And even in the early 60,s you could have bought a used 352 FE cheaper than rebuilding a Y block. the 2 bbl 352 was rated a 250 HP. My father bought a New 64 chev Pk. 283 & 3speed 410 gears. The cam went flat. and in 65 I installed a sears remanufactured short block. cost $125. bored .060. I added a 4 bbl carb and dual stock mufflers. And I never was beat in any drag race in that truck by any Y Block. I heard several stories about fast Y blocks however I never came across a single one. I hauled heavy loads in that truck. I would put weight in the bed and drag vehicles behind it on a tow bar. many of those I towed where 55 and 56 fords. I eventually totaled that truck. Then put the same engine in a 63 short bed with double hump heads and a 30-30 cam. eventually a pressed in piston pin came loose and wore a deep groove in the cyl wall. I blew up a lot of Muncie 318 three speed transmissions behind that little screaming 283 bored to a 292.