It has been a while since I have been on here. Unfortunately, my 1977 Chevrolet Caprice is still in the garage, because it began to leak antifreeze after I drove it about 4 miles round trip one day. It appears that the leak is coming from the back of the motor, against the firewall. I am in the process of taking the motor apart, because I decided that I didn't want to 'put a band aid on the motor' by just fixing the one problem; and knowing that almost everything on the motor is over 40 years old now, another issue could develop easily. While taking the motor apart, I found rust stains in the aluminum intake manifold, and what appears to be surface rust cylinder heads and inside the block after the water pump was removed. Also, the antifreeze that remained in the cooling system had a rust-like color to it. Most of the cooling system has been removed from the car at this point.
I am trying to explore my options at the moment. On the one hand, I have a stock motor with around 64K on it. I could take it apart, send it off for an acid bath, etc; but I am guessing that will probably be an expensive endeavor. On the other hand, I am considering just pulling the motor and replacing it with a crate motor. I was originally considering the GM Goodwrench base 350 SBC, swapping the camshaft for a little more power and a noticeable idle and adding an Edelbrock Performer intake manifold; but now, I am considering the Chevrolet Performance 350/290 SBC with an Edelbrock Performer intake manifold. Has anyone swapped the 350/290 in any of their vehicles (does not even have to be a B-Body), and can you tell me if the camshaft in the 350/290 crate motor has a noticeable idle, please? I tried to ask this question on a vendor's website, but the function for submitting the question was not working properly.
Thank you, in advance, for helping this fellow B-Body owner get back on the road...soon.