[miker98038]

Have to know the year. If it’s early birds, the 292’s used T-86 R-10 o/d, but the 56 &57 312’s used the T-85 R-11. Much stronger, sought after even today. Used behind the 390’s before the 4 speeds became widely available.

You can look them up, T-86 is a top loader, T-85 a curved side cover. You can see that much from under the car. After all these years, check don’t assume.