View Full Version : exhaust hedders

03-12-05, 08:52 PM
I read a sort of old post from evilrussian (member.php?u=5127) (http://www.cadillacforums.com/forums/showthread.php?t=27821&highlight=hedders)
that he was able to put Shortie hedders on his motor. Do you guys think that those same hedders will work for a 307 or 305 motor? I know most SBC motors use the same parts but I am very curious to know if they will work

I posted a few weeks ago about getting a 500 cid from someone but later found out after driving the car it had problems with the bottem end of the motor so it wasnt gonna be a free luck swap. I chosen to stick with my 307 until I can get a good deal on a better motor. But for now I am stuck with my 307 in my Caddy and 305 in my 83 Caprice and pray that I can get a donor car with a atleast the 350 SBC running.

Also anyone know or have a port box built in the box caddy? 19xx to 1989 trunk? I banging my head on building a port box and cant seem to come up with a design

03-13-05, 04:34 PM
The hedders I got can work on 305/350 Chevy blocks only. I'm not so sure about 307 which is supposed to be Olds motor. I have no idea how those manifolds look like and whether exhaust ports and bolt holes are even in the same location as Chevy manifolds.

03-13-05, 05:59 PM
Externally the 305 is identical to a 350 Chevy. The 307 Olds is a completely different motor, it will not accept SBC headers. Might wanna check and see if Cutlass headers would work, dont know if you can get them in shorties though.

03-13-05, 06:16 PM
I found this site for reference on hedders for Olds Cutlass with a number of parts and praying that these guys can help me