1968 cast iron thermostat housing

**Jack C.** · August 29, 2008, 09:45 AM

Re: 1968 cast iron thermostat housing

My early nearly all original 68 427/400 is aluminum.

**Jack C.** · August 29, 2008, 09:50 AM

Re: 1968 cast iron thermostat housing

It's difficult to see the pn# because of the carb but it looks like 3677660 and the pn#is on the base of the housing and not the neck where the hose attaches.

**Joe L.** · August 29, 2008, 01:28 PM

Re: 1968 cast iron thermostat housing

Originally posted by Robert Moon (20478)

In the the 1968 judging manaul it states that a cast iron thermostat housing was used, I have an early 68 435 horse (serial# 3907) car. Is this correct? and if so what is the part # or how can I identify it.
Thanks Bob Moon

Bob------

All 1968's, except L-88, used the GM #3877660 ALUMINUM thermostat housing.

**Dick W.** · August 29, 2008, 01:55 PM

Re: 1968 cast iron thermostat housing

You can see that the manual is about as clear as mud on that issue! Comments duly noted

**Robert M.** · August 29, 2008, 03:42 PM

Re: 1968 cast iron thermostat housing

Thanks Guys; The reason I asked my 427-435 also has the 3776660 aluminum housing but the part # is located on the neck not on the housing as Jack Corso described.