I am building a 289 from a virgin block that has been bored .030 over and piston matched from machine shop ect. When I started I had two complete motors to choose my rebuild from old mustangs, 289 and 302 complete motors. The 302 had already been boared .060 so I went with the virgin 289. I decided to use the 302 (D0OE) heads that came off the 302. I noticed the pushrods from each motor I tore down were different lengths (not much). The longer ones seem to come out of the 302 that had these 302 heads on them. Which push rods do I use? How can I measure and be sure I'm using the right pushrods for this motor? I assume these pushrods are 6.905" and 6.805" length. I read somewhere to use 6.905" for the 289/302 with 302/351heads, how can I be sure?
-Mike.
Also I am using a high energy comp cam, FR4 Edelbrock intake, headers, EFI Dist
pushrods: