The cross-section of the bars was determined by the stuff I could find in my scrap box, so anything similar will probably do, providing it is strong enough. The bolt holes through the bar are sleeved with a bit of tubing, to prevent the bar from collapsing when the bolts are tightened.

The pulley is A Dayco 00032 (thanks to War Machine for that!)

The main bar is 40 x 20 mm, and started life as a shop display stand - wall thickness about 2mm. The alternator brace is 20 x 10mm solid aluminium alloy, and was part of an old photocopier.

The bolts are 118mm long, (not including head), 22mm of which is threaded. Bolt diameter is 9.5 mm (3/8"). I got them from my "magic bolt box", they probably came from a Chevy engine in the first place, possibly starter mounting bolts by the look of them. Don't know what the thread is, approx 16 TPI

DISCLAIMER

These measurements were taken to help a friend. Absolutely no warranty is given as to suitability or accuracy.

However this has been on my car now for over 6000 miles with no problems.

Hoppy motoring,

John (Britvette)