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Author Topic: 1969 GT 350 thermastat housing  (Read 546 times)
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aboss4tg
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« on: October 16, 2017, 03:54:24 PM »

Working on prepping the 351 for paint after a rebuild on my 69 and want to know if the thermostat housing is aluminum or cast iron. I have the cast one that was on the motor when I purchased the car and also have an NOS aluminum.
 May paint this weekend so need some help on which one is correct.

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Bob Gaines
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« Reply #1 on: October 16, 2017, 06:08:59 PM »

Working on prepping the 351 for paint after a rebuild on my 69 and want to know if the thermostat housing is aluminum or cast iron. I have the cast one that was on the motor when I purchased the car and also have an NOS aluminum.
 May paint this weekend so need some help on which one is correct.
Aluminum with the vacuum switch port. On a 69/70 GT350 thermostat housing the port where the vacuum switch goes is plugged with a square headed pipe plug. The vacuum switch is not used on a 69/70 GT 350 but it still should have the plugged port.  

« Last Edit: October 16, 2017, 06:10:39 PM by Bob Gaines » Logged

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aboss4tg
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« Reply #2 on: October 17, 2017, 03:27:42 PM »

Thanks again Bob,

Is the square headed pipe plug unique, certain size?

Also would the complete housing be painted, plug, bolts and housing?



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Bob Gaines
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« Reply #3 on: October 17, 2017, 03:48:43 PM »

Thanks again Bob,

Is the square headed pipe plug unique, certain size?

Also would the complete housing be painted, plug, bolts and housing?


Plug is not unique. The housing is painted. You could paint the plug or leave it unpainted.i wouldn't deduct ether way if I were judging. The bolts are painted but given they were un tightened and re tightened when moved from cast iron intake to aluminum one they would show signs of paint damage in real life. Most restorers make them perfect paint also because they don't take that historical sequence into consideration.

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