I don't think Austin 8s actually had a chassis.
I'm quite prepared to be corrected however.
A photo of your car is all we need to identify.

Location: Bristol

Hi Graham.

The front bodywork and the chassis number would be right for a spring/summer 1938 Big Seven, but more info would be helpful.

Location: Herefordshire, with an "E" not a "T".

The Austin 8 had a "platform chassis", a reinforced floor pan which was the immediate precursor to modern unit construction.
The quickest way to tell a Big 7 engine from an 8 (they are not the same, although they share many components) is the shape of the side water branch. On a Big 7, this is a long affair, from high on the back of the engine to low on the front. The 8 outlet by comparison is much smaller, half the engine length, on the front 1/4 of the block.
The petrol pump, if it's the same as the Big 7, is identical to an Austin 7 type, only the arm is different.
The Austin 7 arm, although superficially the same, doesn't work in a Big 7 (or presumably, an 8).

Location: North Wiltshire

how many wheel studs does it have?

3 on a big 7

4 on an 8

But I agree with Martin. The pic on your website suggests big seven.

Hi Graham,

Welcome to the forum. There are a number of close up images of a 1939 Big Seven Engine in the first link below - interestingly this engine has also had its mechanical fuel pump removed, a blanking plate fitted and a period 1930's SU electric fuel pump substituted instead. The apparent reason for removal of the mechanical pump would appear to be that the owner has opted to install a modern spin off oil filter unit in the area previously occupied by the mechanical fuel pump!

http://vintage-engineering.blogspot.co.uk/2013/05/1939-austin-big-7.html

I'm sure it should be possible to locate a replacement mechanical pump in the UK. Brand new pumps are available for the earlier Seven's - see link below, but as Tim has pointed out the actuating arm that runs on the cam lobe is a different shape to the arm on the Big Seven so unfortunately won't fit your engine.
https://www.theaustinsevenworkshop.com/products/f0212-mechanical-fuel-pump

Suggest you contact Robin Taylor at Austin Big 7 Spares - he offers a range of Big 7 parts - request his list of spares.
Email: robin.e.taylor@talktalk.net

I would agree with the others your small photo appears to show a Big Seven Ute.

Below are some images of an Austin Eight chassis and engine - totally different chassis and notable visual differences in the engine as described in earlier posts above - note the much shorter in length alloy side water inlet for example.









Jeff.

Location: Almost but not quite, the far North East of England

Hi Graham,

I forgot to mention in my above reply - a very obvious difference between the Big Seven chassis / running gear and that of the Eight is that the Big Seven just like earlier Austin Sevens has a single transverse semi-elliptic spring on the front beam axle and two quarter-elliptic springs on the back axle whereas the Eight has two semi-elliptic springs on both the front and the back axles.

Jeff.

Location: Almost but not quite, the far North East of England