SBC engines 283-305-307-350s Trade for Suregrip

5 engines for 1 good suregrip center 741 742 489 with 323,355 or 391 gears.
The 283 is a 1963 with powerpack heads.The 305 has the high compression heads to bump the compression up a full point on the 350s.Also both 350s did run and one is a 4 bolt main truck engine with the heavy duty rods.The other 350 is from a wrecked 89 chevy pickup with 98,000 miles.I bought it as a spare but i sold the truck so here it sits.The 307 also still ran but lots and lots of blue smoke.