Alright. Well i have a 1969 mustang
with an original 2V 351W. I had a 2 barrell on it (stock) and it was nice and torquey. Well i blew my water pump and when i had the shop do the repairs i had them throw on a 4 barrel intake off a 69 cougar and a brand new holley 600. Well they ran a vacuum or compression check and told me my number 8 cylinder is like 70 percent off its compression. Now i can put my foot all the way into the pedal and not break 60mph and have lost all torq. I want to fix this myself but would like some suggestions on what it could be.
My first thought was that cylinder had a blown piston ring.
Another thought was the number 8 cylinder valve spring on the head was fkd.
could even bee a partially blown head gasket.
Im just reluctant to delve into it because I dont want to find out it needs a overbore lol. Tell me your thoughts. Thanks.