what do these numbers stand for 86 monte 305 enigne

[youngdeezy]

I305 or 1305 and i saw these as well.
h49 551
the only number i did figure out was the block casting 14088551 which is a 86-92 2 main. im not to sure about the other numbers i thin I305 is the date code sep 30,1985. anyway if you know how to look this stuff up drop the word on the numbers thanks.

 

[Jim Rockford]

the area you got this 14088551 should had 5.0 cast in it also .

 

[Doober]

Is the I305 on the intake manifold? If so your thinking is correct, which would also be right in line with the '86 model year. Where was H49 & 551 at?