View Full Version : 350 heads on a small block 400

06-06-2006, 11:28 AM
anyone ever done it pretty sure that would work allright

06-06-2006, 11:39 AM

06-06-2006, 12:07 PM
Right arm thanks liz sounds like they have some experience with the swap.

06-06-2006, 12:21 PM
I did that with my Dart heads on to a 406 all I did was drill the steam holes like they showed in that link that James posted was real easy and worked well.

06-07-2006, 10:00 PM
Use 400 head gasket as a template to drill steam holes and your good to go.

06-08-2006, 06:31 AM
If its a stock 400, put some small chamber heads on it. That will get your compression up to about 9.5 to 1 from 7.8 to one.That and a good cam and you'll make some decent power.

06-10-2006, 11:51 AM
The motor is actually done up i dont know whats done to it or even what i fucked up in the head but i have a 350 here that runs i was hopin i could just swap straight across buy some gaskets a lil drilling and just romp it. il probably end up losin a bunch of horse cuz the heads were probably done this small block used to burn off 44's

06-10-2006, 02:47 PM
What is in the block for pistons, dished, flat tops, domed?
What are the casting #s on the heads that came off the block? ( under rocker covers )
Do the ports & combustion chambers look as cast or smoothed out?

BeerBaron Sr.
06-13-2006, 07:59 PM
Pumpkins right, but if you have an option use the "350",and save a motor swap down the road.

06-14-2006, 08:19 PM
Small chamber heads? Surely not 58cc 305 heads? Those bring a 350 into the 10.5:1 range...I'm guessing you mean in the mid to lower 60's cc?