* 253 Low Compression at 8 to 1 or 253 High Compression 9 to 1.
* 307 from GMC 8.75 to 1 Compression.
* 308 Holden new power horse 9 to 1 Compression.
* 350 Low Compression at 9 to 1 or 350 High Compression 10.25 to 1.
The owners manual claims horse power for the 350 H.C at 300Hp at 4800 R.P.M and Torque 380 (lbs./ft.) at 3200 R.P.M
No surprise that the HT 350GTS took 1st & 3rd place in the 1969 HARDIE-FERODO 500.


For rare used and new parts and accessories for your Holden see my web site at.
http://www.seamarineandauto.com.au/
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