ID this motor

[RustyCJ]

Didn't they start using the 351M/400 in 77?

http://raceabilene.com/kelly/hotrod/engine2.html

According to this link the 351m/400 ran from 75 thru 80

the 400 71 thru 80 and looking at my stamping the last two digits look to be 2 A. So out of the seven digits I've come up with D 4 A Blank Blank 2 A.

 

[flareside_thunder]

yea that deck is waaaay to wide for a 351w anyhow...

 

[surewhynot]

When you say spacer could it also be called an adapter? Because they did have that just called it something different

That could be it. It raises the cap up, and a bigger rotor is used with the wider cap.

 

[gsxr1238]

Look at the outlet water connection.It bolts to the block.'335' series are the only ones that connect this way.351C,351M,amd 400 all have dry intake manifolds.Order a cap,base adapter,rotor,and wires for a 1978 400 engine and you will be good to go.

 

[RustyCJ]

Thanks all for the help. Surewhynot mentioning the spacer, things started to sink in at that point. So I got the Cap, Rotor, Plugs, Wires done. Went with the newer( I think ) version and the following pics maybe will help out someone in the future.

Here's the old cap.

Here's the adapter.

And the different style cap.

 

[lenny1carl]

Good job...but just a voice of experience...get rid of the wire nuts and replace 'em with butt connectors and shrink tube. Sooooo many saved headaches down the "road".

 

[flareside_thunder]

Carl, was that a pun?

 

[RustyCJ]

Good job...but just a voice of experience...get rid of the wire nuts and replace 'em with butt connectors and shrink tube. Sooooo many saved headaches down the "road".

Yeah, this truck is an electrical nightmare. The PO has wires running all over the place, some bare spots, corroded ends etc. Just a matter of taking on at a time and figuring out my this was done in the first place and correcting it.

So just to recap here on the motor. It was made in 74 and is a 400?

 

[flareside_thunder]

The 74 is not necessarily the the year of the engine but the year for that particular casting. And yes, it IS a 400.

 

[393clevor]

whats it say on the sticker on the valve cover? looks like a 351m/400

 

[fatherdoug]

Another way to tell. The 351M/400 is the only engine that has the fuel pump mounting bolts at the top and bottom, rather than side by side. Your engine's thermostat housing goes into the block, at the top, not into the manifold. The 351M/400 has a dry manifold.