I'm looking to replace the intake on my brothers 88 cutlass supreme classic the reason being is that a bolt for the thermostat housing broke. Machine shop says it would be cheaper to replace it and since local junkyard is having a 1/2 sale maybe he's right. So now are there any I should steer away from are any better than others or do I just get one off any olds 307? Or maybe tips to get bolt out. The bolt sheared off with only about 3/16" on top of the intake.