[TR] Swapping TR3A block for a TR4(A?) Block

[Randall]

> I have acquired another block from a club member ( Ser # CT25743E)
> which I think is from a TR4 or TR4A.

Should be a 63 TR4, I believe.

> Can anybody tell me what
> won't work and what I will have to acquire?

AFAIK, the block castings are identical.  You'll need to swap the front
plate from your old engine; and of course keep the main caps from the new
engine but I believe everything else should interchange.

Don't forget to look at things like cam bearings, and the bushing that
carries the oil pump drive shaft.

Randall