Will a 327 engine run well in a Chevy Caprice(85)?

I have a 327 engine and my 305 has gone to sh!t! Could I rebuild the 327 and replace the 305?

absolutely. it's just another size of small block chevy engine, although a bit more rare.

I own a shop, and think this; The 327 was used for many years in big ole heavy Chevy's, and took them down the road pretty easily, but these were lower geared than your 85 will be. I build a lot of engines, and try to keep in mind what the vehicle weighs, ratio of its gearing, and the size of the wheels that will be used on the vehicle. How you cam the engine will be critical. Example: You wouldn't want to add a cam that has more upper end, than it does bottom end, or you will find an engine that will struggle to get going. This will make a perfect engine for your 85, but if it was me; I would contact the cam manufacture, and be prepared to have all your information handy when you talk to a tech about the right cam to use. You will also have to include such things as the cylinder heads you will be using, the induction, as well as how much compression you will be aiming for. Quite often builders will make the mistake of adding a camshaft based on horsepower numbers the grind was originally designed for. Just because the original grind was for a 360 horsepower Corvette, doesn't mean it will work best in your vehicle. Even the type of lifters & valve springs are going to play a very important role in making your car go as expected. Comp Cams now has a neat download you can get to determine your best cam by adding in the information about your vehicle. It will give you several different grinds for your expectations, and the all important horsepower & torque estimate the engine will make. It is one of the best tools I have ran across in a long time, and is extreamly helpful in making your final decision. Hats off to those guys over at Comp Cams! With some research, and digging, you will be able to come up with a build that will throw you in the back seat all the way through the rpm range, and isn't this what we all want out of an engine? Once you get this mighty little engine in your 85, you will be very glad you did your homework before, and not have an engine that just didn't get going as you expected. Trial & error can get expensive, and doing it right the first time always shows. I have built many 327 engines that would melt the pavement, so I know they can be made to haul the mail, and you will be well pleased with your car.
Glad to help out, good Luck!!!

Yeah, it's a chevy small block just like the 305. It will have better heads and more power.