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Old 02/08/2006, 10:26 AM   #5
My Car Details
Jayscal's Avatar
GT/CS owner for 23 years

Location: Florida
Joined: Aug 02
Posts: 247

What is so bad about the 65 289? If it was a factory 4 barrel motor it has the closed chamber heads. These heads also have the built in pushrod guides. The 289 4V engines were 10:1 compression rato. These heads used to be highly sought after before the aftermarket head manufacturers became reasonable. The motor you have is probably stronger than what was originally in the car.

When my original 289 2V got to 225,000 miles I bought my friends tired original 289 4V block and heads. The block had never been bored out, so I bought it to rebuild while I was still using my car as a daily driver back in 1989. In 2002. I wanted to increase the horsepower, so I installed a bigger cam and had bigger valves installed. The intakes are 1.94 and I believe the exhaust are 1.750, It is kind of close but it works great. You can also go with stock valves and have hardened seats and stainless steel valves, and keep the high compression.
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1968 GT/CS - Royal Maroon - Built for speed
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