| Diagram | Fig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 13 |
| Subsystem | engine bottom |
| Listed in parts books | 1976–1980, 1985 |
Piston Complete (7.9 : 1)
Complete piston at 7.9:1 compression ratio, listed in crankshaft and connecting rod catalog sections from 1976-1985.
71-3778 is a complete piston listed at 7.9:1 compression, as it appears in the catalog under the crankshaft and connecting rods section. "Complete" in the parts book means it's the piston itself along with whatever fitted components make up the full piston assembly, not just a bare casting.
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The catalog places this piston in engine bottom-end records spanning 1976 to 1985, so it shows up across several years of listings in that range. Beyond the compression ratio, our record doesn't spell out bore size, ring pack, or which specific engine family it's meant for, so before you order, check it against the piston you're pulling out or against your engine's spec plate.
If you're rebuilding and need to match compression ratio to the rest of your top end, this is worth having in hand alongside your old piston for comparison. Call the shop if you want us to confirm fitment before you commit to the order.
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