no, the 302's would most likely blow the 351, if its a big block
Yes, the block should work. Both are 302 HO roller blocks so that shouldn't be a problem. If you are considering using more of the engine there are a few things to consider. 86 302's use E6XX heads and Mountaineers come with GT40 heads. So if you are dropping the whole long block in expect to have significantly less power. The top end (intakes) of the motor also won't have all the same provisions for sensors and emissions.
No, they are in the engine block, not in the heads. Freeze plugs are a misnomer. They are actually casting plugs.
It is on the back of the block between the cylinder heads at the very top where the intake manifold meets the block
It should work fine as long as it all lines up correctly
what is the torque pattern for ford 302 heads?
The 302 boss has slightly bigger heads, it comes stock with 351 Cleveland heads.
Yes, if it's a 302 and not a 4.6 like in the newer mustangs the 302 and all aftermarket 302 heads should fit.
my 302 is putting out 300 raw horse and 260 horse at the rear tires
900 crank horsepower is a safe "new" boss 302 number
If you're wanting very streetable power then you need to take a look at AFR (air flow research) heads. They took a stock 302 ford, did nothing but change the heads and it gained almost 100hp. Howerver for big block applications I would look into the Brodix line.
which freeze plug you want there are several. along both sides of block,at rear of block behind flywheel and also in both heads
pretty much any 302, or 351 heads will fit