Numbers

[minidean]

Found these numbers stamped on the engine. I know the engine has been modified and I believe these number have something to do with this. But what do they actually mean?

[Craig]

The 1002 may be the job or invoice #.
21.0 CC is the combustion chamber volume.
0.040 is the amount of material that has been removed from the face of the cylinder head.

Craig

[minidean]

Is there anyway people can work out who's work this is?

[minidean]

I was contacted today by Brett Simms Motor Sport (Ex Longman employee) who confirmed the numbers on the head mean that this work was carried out by Richard Longman & Co in 1976.

The following was confirmed:

Number 1002 is the head number which all details of valve sizes, springs ,chamber volume and customer name and date when done
1002 is a GT 6 road head
1.405 inlets
1.150 exhaust
road spec springs
The second number is chamber volume
The third number is the amount skimmed off.