[blueghoast]

Originally Posted by Mike S

Just picked up a complete carb to pan 74 400 engine. Tore it apart. It must have had some kind of rebuild. Stander bore with stock pistons but the crank was cut 30 on the rods and 10 on the mains. It has new freeze plugs and looks like new cam bearings. Think I am just going to get a rotating assembly from Butler.
The heads are 5c-8 101cc screw in studs if anyone wants them they can have them.

I'd do a RAIV style build with a overdrive tranny and at 2000 RPM's
Be right in your MPG sweet spot?

GT

[F ROCK]

Mike, what heads will you use?
I've got a (free) pair of 1974 #46's just sitting, and a pair of #11's here in Clementon.
I'll be at Atco today for the finale.
I've got a '71 GTO. It ran great with the 8.2:1 400 and 3.08 gears.
I think about 17 mpg but just an estimate.
It was no monster, but ran respectfully, chirped second with the t400 and Transgo shift kit quite easily.

I eventually installed a muncie, and then a 464.
For me, with the 4 speed, the 400 was more fun to drive. The 464 just blows the tires up, and i worry about breaking stuff.
I'd bet the 464 would be more fun with the automatic.

[77 TRASHCAN]

I've always thought 6X-4 heads with 4" crank in a 400 block would be an easy deal for a street engine. The chambers will allow a decent compression ratio. Just a great combo, my opinion...

[Mike S]

I am going to use my 6x heads that are on the 455 now. I had them milled to a 90cc camber, They have new valves and guides and mild home port work. They should put me at about 8.8 compression. Might mill them a little more to get me at 9-1 on the 400.
The heads work great on the 455 put me right at 10-1. Went 11.7's at 3900 lbs with them.
I have a set of 46's with 96 cc chambers and 5C's with 101 cc chambers that I won't be using.

[77 TRASHCAN]

If you are getting a rotating assy from Butler, I wonder how much more a 4" stroker would cost???