engine id numbers

[Matt]

where do i find the id numbers on a big block and how do i then id it lol

 

[moparleo]

MyMopar - Mopar Forums & Information - Mopar Engine Casting Numbers 1959-1978

 

[Matt]

Thank u so much and at the risk of sounding dumb what is the difference between a b an rb and an la engine

 

[Grady Cain]

Thank u so much and at the risk of sounding dumb what is the difference between a b an rb and an la engine

Big-Block Mopar Performance

 

[340challconvert]

The difference between B and RB blocks is that the RB block is taller (440-longer stroke). B stands for "low block"(383-the stroke is 3.375") and RB stands for raised block 3.75" stroke. Accessory brackets and exhaust manifolds should be interchangeable but the intake manifold isn't.

 

[340challconvert]

And just to add to the confusion
Big block Engine displacements;
B blocks came in 350B, 361B, 383B, & 400B sizes.
RB blocks came in 383RB, 413RB, 426RB, & 440RB sizes.

 

[340challconvert]

Small block Mopars are a whole other lesson!
See attached article below.

 

[340challconvert]

Small block Mopars, check this out;
LA - Chrysler small block V8 engines

 

[Matt]

Love the info thanks again