[adavis]

I have an 010 block in my 79 Vette which is a L48. Its a numbers matching motor, its been in the family since 1980. I have been doing some research and it sounds like I might have a small shot at a 4 bolt. I always thought it was a 2 bolt. Some guys are finding 2 bolts and some are finding 4 bolts? What are my odds?:thumbsup:

 

[ss1970chev454]

you'll need more info than that to determine if it's a 4 bolt. I believe 010 indicates 350, and that could go either way.

 

[Tom Mobley]

the 010 blocks machined for either 2 or 4 bolt caps at various times. The only real way to tell for sure is look in the pan.

might be able to tell with some kind of bore scope through the oil drain plug hole if you could find one small enough. Truth is that for any reasonable street engine it doesn't make much difference.

 

[RB69SS396Conv]

Right; the casting # doesn't tell which main caps the factory installed on it.

I'd say you have near 100% odds that it's either a 2-bolt or a 4-bolt. Not sure what difference it would really make though...

 

[langss]

If its any comfort,the 74 Corvette I had was also the L48 and it was 2 bolt main.

 

[RB69SS396Conv]

Actually, 010 doesn't even indicate 350.

Just, 4" bore.

The same block casting was also used in 302s and 327s.

It's just yerbasic run-of-the-mill late60s/all70s 4" block.

 

[7-t-elco]

L-48...bet it's a 2 bolt, nothing Hi Po there...

 

[trmnatr]

I have some 010/020 blocks which is a good block

If memory serves correct an 010 is 10% nickel, a 010/020 is 10% tin and 20% nickel if memory is correct

 

[Busted Knuckles]

The 010/020 nickel and tin content meaning is debatable.
The "2482" main caps are nodular, that's a performance block for sure.

 

[J1970SS]

I have some 010/020 blocks which is a good block

If memory serves correct an 010 is 10% nickel, a 010/020 is 10% tin and 20% nickel if memory is correct

everyone i know says its all word of mouth bs......

i would take it with a grain of salt...