To definitively answer, you need to know the year of your 327 and the specific transmission you're considering. Then you can compare the bellhousing pattern and input shaft diameter.
However, some commonly used and adaptable 5-speeds include:
* T5 (World Class): This is a popular choice, readily available and relatively inexpensive, and often used in swaps. *However*, you'll likely need a hydraulic clutch setup and an adapter (potentially) depending on the T5's year and your 327's bellhousing.
* Tremec TKO series: These are stronger and more robust than T5s, but also more expensive. Again, an adapter or specific bellhousing may be necessary depending on your specific engine and transmission.
* Muncie M21/M22 (4 speed, but relevant): While not a 5-speed, it's worth mentioning because it's a strong and classic small-block transmission. Some aftermarket companies produce 5-speed conversions based on the Muncie case.
You cannot simply assume any 5-speed will work. You absolutely *must* verify compatibility by researching the specific transmission and your engine's year and bellhousing. This often involves checking the bolt patterns (number and spacing of bellhousing bolts) and the input shaft diameter of the transmission to ensure they match your 327's bellhousing and crankshaft. Consult a parts catalog or a specialist in classic Chevy drivetrains.
