Sweet!

I finished mocking up the 180* headers. Ready to test fit in car. Also working on an adjustable cam timing sprocket.

John, Great work! I noticed when I pulled my motor apart the nylon cam thrust button was brittle and fell apart. Are you using something better?

Hi,
Thanks for the compliment on the exhaust. Its been a fun project. I have never had a problem with the cam thrust button before. Not sure what to tell you on that. I'll look into it.
Cheers

The 180* headers are finished and installed in the car! Sounds great! Kind of like an older Can Am sports car. A bigger performance gain then I had expected. Cheers

This is what 180 degree headers with dual exhaust sounds like. Sounds like two four-bangers running together in unison live and in stereo. Probably not the exhaust note for everyone, but I like it! Cheers.

https://www.facebook.com/100011458479905/videos/1110335446025061/

New LS inspired stand alone fuel injection for the Cadillac 4.5/4.9 engine. Electronics are Fast Retrofit TPI Kit.

John, Excellent work! Over 60,000 hits on this thread! Keep the idea's coming!

That certainly is a handsome EFI plenum!

Jon Olshewski, Auto shop teacher at Salt Lake City, UT East high school and his students are working on an interesting project. They discovered that 215/Rover heads bolt on with the inside headbolts and pushrod and lifters line up. Outside bolts are on the edge of the heads and would need material added for those bolts. Here are some pics of the 215 Olds heads on the 4.9 Caddy block.

Jon here.  

The other slightly inconvenient flaw to this is the valves are backwards. As in the camshaft lobes aren't for the correct valve.  We have talked about running the engine as a Hot Vee setup or custom making a cam blank and getting a fresh one made...

Engineering and educational aspects aside, what is the benefit using 215 heads on a Caddy engine ?

Caddy 4.9 has iron heads.

Amazing idea.

I guess the inlet manifold would be the next bit of fun.

What about the rocker oiling?

V8

Tell them to find a set of aluminum '64 Buick 300 heads if going to all that trouble.  

I mentioned the Buick 300 heads. He actually was looking at the TA heads. Pushrod oiling. The cam is the biggest ordeal.

Carl, remember when we were trying to figure out a spider for the short V6 roller lifters for the Buick/Rover. Looks like the Caddy one would line up perfect.

Pic of 4.9 gasket on 215 head. Bore spacing and inside headbolt holes are perfect.

The catch to both of these is that the Cadillac head is only 2/3 the actual material size of the Buick 215 head.  So in reality the Buick head is even lighter than this technically in what it replaces.

https://youtu.be/gkRPwE55Iuo

In our application we are all about weight reduction.  In race trim this has body panels on it.

Basically 2200 lbs or 1000kg and All Wheel Drive.

Once you get it sorted, that will be a hoot in RallyCross.

Looks like you may have some studs and exhaust bolts wanting to occupy the same space.

That Caddy engine is a wet liner, open deck block.
I bet that there's room to move the outer head bolts inboard in the block enough to fit.
The rover cam looks close enough to fit as well, with some creative machine work.
The only real PITA would be the dist drive gear. Machine the bearing journal off the rover cam and machine the caddy drive gear and journal to press fit back onto the rover cam. Pin, through bolt or braze the whole thing together and your good to go.

Uh, I know a guy with billet, round lobe, cam blanks ?
                                                                                         Art.

I don't think this design will allow what you are suggesting.