I was fortunate to get the '70 heads with the '70 cutlass basket case I bought. I got a motor home 403, and put the '70 heads and a Lunati VooDoo cam, about 485 lift. as I recall. Edelbrock intake, headers. 200 4r trans. Not driving yet. Gotta fix the brakes, and lights.
they will bolt on but thats about it. the valves will probably hit the block and not only that but you would have less compression in the 307 with them 350 heads than from factory. a 350 would run better with 307 heads than the other way around lol
I was fortunate to get the '70 heads with the '70 cutlass basket case I bought. I got a motor home 403, and put the '70 heads and a Lunati VooDoo cam, about 485 lift. as I recall. Edelbrock intake, headers. 200 4r trans. Not driving yet. Gotta fix the brakes, and lights.
Good luck with your build. I have a 403 with 69 heads and crank RPM intake and Crane cam in my 80 Cutlass Supreme
The Offenhauser 360 degree equa flow intake will help a great deal standard flange
Would these heads fit on to a 307 engine?
Depending on year yes, I recall that 87 plus have roller rockers that may be an issue
they will bolt on but thats about it. the valves will probably hit the block and not only that but you would have less compression in the 307 with them 350 heads than from factory. a 350 would run better with 307 heads than the other way around lol