* Year of the vehicle: The engine bay and chassis dimensions vary slightly across different Ford models that used the 351 Cleveland. This impacts header fitment.
* Specific chassis/body style: A Mustang will have different requirements than a Torino or Ranchero. Even within a model line (e.g., Mustangs), different years may have variations.
* Steering: Headers often have to clear steering components, which can vary depending on the vehicle's specific setup (e.g., power steering, type of steering box).
* Suspension: The header tubes might need to avoid contact with suspension parts.
* Exhaust system configuration: Do you want shorty headers, long tube headers, coated headers, etc.? This directly affects size and clearance requirements.
* Modifications: Engine modifications, like aftermarket intake manifolds or accessories, can significantly impact header clearance.
Therefore, you can't simply say "these headers fit." You *must* specify the make, model, and year of the vehicle. Then, you need to look at header manufacturers' websites (like Hooker, Hedman, BBK, etc.) They will often have detailed fitment guides that specify the exact vehicle year, model and options their headers are compatible with.
To find the right headers, I recommend:
1. Identify your vehicle: Make, model, and year are critical.
2. Check manufacturer websites: Look at the fitment guides on major header brands' websites. Use the specific details of your vehicle to filter the options.
3. Read customer reviews: See what others with similar setups have experienced with particular headers. This can reveal potential fitment issues or other problems.
4. Consider professional installation: Header installation can be challenging. If you're not experienced, a professional mechanic can ensure proper fitment and avoid damage.
Without knowing the specific vehicle, any header recommendation would be pure speculation and could lead to fitment problems.
