what is the difference between the regular 302 and boss 302? i am getting an engine block that is supposed to be a boss 302. do you have any tips that i can use when i build it up.

 

In my understanding, the Boss 302 block was a four bolt main and beefed up rods, etc. If I'm wrong, someone please correct me. Should be easy to id.

Joseph Osborn
70 F-100 Flareside
302 V-8 3spd stk

 

The Boss 302 is a 4-bolt main with a forged steel crankshaft and super-strong connecting rods with 3/8" bolts. The Boss 302 had a compression ratio of 10.5 or 11.0:1, a cast aluminum high-rise intake, and a 780 cfm Holley carburetor. The heads were modified versions of the 351 Cleveland with canted valves. It looks like it was only produced in '69 and '70 and turned about 290 HP.

'82 F150 2WD w/351W (orig 300 I6)
Slik

 

I am not sure if it is a boss 302 I have not seen it yet i will get it tuesday. When i build it i am going to put a 289 crank and 351 heads and intake. not sure what cam yet.

 

I wish I was here a month ago!!!! The Boss block has screw in freeze plugs. This is the easiest way to ID it if the pan is still on or the heads are off. Believe it or not the 351 C used a version of the Boss heads as the Boss 302 came out before the 351C.