RV4 firewall dimensions

I have an airplane very similar in size to an RV4. Mine has an O320. My cowl is damaged, and am considering attempting to persuade an RV4 cowl to fit my firewall.

I think I am in the best possible place to ask: What are the outside dimensions of the RV4 firewall?

Thanks

PM an email address and I'll send a couple screen shots of the profile dimensions.

C. Smith
RV4 serial #68

Mine is ...

25 3/4" wide x 29 5/8" high

HFS

HFS

Thanks for the dimensions.