307, they any good?

I've heard they were dogs but I used to know a guy who rebuilt one in his Nova and thing was pretty fast.

/wwwthreads_images/icons/wink.gifSomebody once said "Go Big" . . . Well we're goin' Full Size/wwwthreads_images/icons/wink.gif

The 307 is kinda the "Red headed step child" of Chevy engines!
(no offense meant to any red headed step children out there /wwwthreads_images/icons/laugh.gif please don't beat me up and go through my pockets /wwwthreads_images/icons/wink.gif)

They are dependable!
But don't really do anything all that well, not much torque or horse power, but like someone else pointed out this is now in a "willys" it should be more than enough, in fact if it were a 350 it would probably destroy the rest of the drivetrain anyway.
I have had a few 307's the good thing is that any small block chevy accessory will bolt right up (headers, intakes, HEI, etc...) the best performance upgrade you can do for it is put 305 heads on it! they have smaller chambers so it raises the compression! /wwwthreads_images/icons/smile.gif

Scooby Dooby Doo !!!

In reply to:

Please don't beat me up and go through my pockets/wwwthreads_images/icons/wink.gif

Click to expand...

Scooby, are you wearing a beanie? LOL!!!/wwwthreads_images/icons/laugh.gif/wwwthreads_images/icons/wink.gif

Not any more, thats for sure! /wwwthreads_images/icons/wink.gif/wwwthreads_images/icons/laugh.gif/wwwthreads_images/icons/smile.gif

Just poking a lil fun/wwwthreads_images/icons/smile.gif
(everybody seemed to get pretty fired up over that nonesense, too much "Drama" for me /wwwthreads_images/icons/crazy.gif)

Scooby Dooby Doo !!!

The 307 has a small cylinder bore, 3.875" and a stroke of 3.250". The 307 shares the same stroke as the Chevy 327. I'm not 100% positive, but I think starting in 1969 the 307 would have the large journal crankshaft. If your 307 is a 1968 then I'm thinking the crankshaft would be the small journal design. The small journal 1968 Chevy 307 3.250" stroke crankshaft would not fit a 350 block. If your 1968 307 has the large journal crankshaft, then it's worth more than any boat anchor could ever hope to get at a garage sale. The short stroke of 3.250" will allow a SBC to build RPM's fast, and makes for a real good 1/2 mile dirt track engine. The short stroke of 3.250" is not the torque monster stroke of the SBC. The SBC 400 crankshaft has a stroke of 3.750" and is the torque monster crank of the SBC. The SBC 305 is really better for mileage and overall performance than the 307. If your 307 is running good, keep it. When your 307 dies, then replace the 307 with one of the better SBC's made after 1969.
dave