Power Steering Conversion
Short answer: To add power steering to a 1968 400, use all the engine-mounted hardware (pulleys, brackets) from a 1968 Pontiac V-8 — each year differs. The best gearbox is a 1978–81 Trans Am WS-6 (2.2 turns lock-to-lock, high-effort, great feel); next best is any 1969–81 Trans Am box.
You must replace the relief valve behind the pressure port in the P.S. pump (the Trans Am box needs more pressure), and replace the pitman arm with the correct curved 1968 one (repro ~$90). Avoid the quick-ratio A-body boxes — their internal stops are different.
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Content last modified: June 13, 2026 at 10:06 am
← Frequently Asked Questions
Hi, I am trying to convert my 1967 Pontiac Firebird to either power or rack and pinyon steering. I am by no means an expert mechanic. I am trying to convert it in the most cost effective but efficient way.
A link to a complete parts list would be very helpful, I’ve found it very difficult to find a complete parts list and people say that modifications need to be done as well. What is the best way to upgrade the steering with little to no modifications?
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