Will my aftermarket high output alternator fit the CVF bracket?
Alternators
Usually yes, but it comes down to the alternator case, not the output rating.
Overview
Short Answer
If your alternator is a standard one wire or GM case style unit with the same case ears and back boss as a stock CS series alternator, it should bolt into the CVF bracket and use the same back brace to the head. A billet oversize case or a relocated back boss may not line up.
What actually determines fitment
Amperage has nothing to do with whether an alternator bolts up. What matters is the physical case:
- The mounting ears. Spacing and width need to match the CS series pattern the bracket was cut for.
- The back boss. The boss the back brace rod attaches to needs to be in the stock location.
- Overall case diameter. An oversized billet case can foul the bracket or the belt path even if the ears line up.
So a high output alternator in a standard case is generally a straight swap, and a modest output alternator in a custom billet case may not fit at all. Judge it by the casting, not the sticker.
About the back brace
The back brace is the rod that runs from the top of the alternator to the cylinder head, and it is included in kits that call for one. It is not optional hardware. It is what stops the alternator from moving under belt load. If your alternator has no usable back boss, you lose that support, and alternator wobble and thrown belts become likely.
Before you buy
Send us the make and model of the alternator you are planning to run, along with your kit part number. We would rather tell you up front than have you find out on the engine stand.
Still need help? Our tech support team can get you pointed in the right direction.
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