looking for valve cover gaskets too. All the gaskets i can find are for the 10 bolt valve covers this has the 5 bolt. I know this is a 307 says 5.0 on the block and 5A on the block and heads. I pulled it out of a 80 olds 98. Drove real nice and has 150 on all cylinders. The guy is putting a 455 in. This engine has no leaks i just want to freshin everything up. And go ahead and correct all my spelling errors.

AlienX wrote:

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I just got a 1980 olds 307 out of a 98. I would like to know what if any parts i can take from my olds 260. The 307 needs a distributor and water pump which i just put on the 260 will these work? The 307 has the 5A heads.

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from the internet:  

BASIC INTERCHANGE
Modern Olds V8 engines displacing 260, 307, 330, 350, and 403 inches are considered to be small-blocks. The small-block motors are 1-inch shorter in height and 1-1/2 inches narrower than the big-blocks. If the engine's original factory paint is still intact a small-block will be gold or blue, while the big-blocks can be red, green, blue or bronze. Late-model 307's are flat black. You can also identify engines by casting letters and numbers.

While exceptions will be noted below,
as a general rule the following parts are physically interchangeable among all "modern" Olds V8 engines:
flexplate and flywheel, engine mounts, oil pan, front cover, water pump, bellhousing (also interchanges with modern Buick,and Pontiac), oil pump, oil pump driveshaft, rocker arms and fulcrum (except early 330), camshaft and lifters (except for different lifter bank angles and lifter diameters; see below), harmonic balancer, cam bearings, timing chains and timing gears. Heads will basically interchange, except manifold ports may not align.