Are my heads RPMs or regular Performers?

[88MustangLX]

Hey guys I bought a set of heads used and need 1.90 valves for my combo as I do not have flycut pistons. I'm trying to figure out which kind of heads these are. They say Performer on the front of the head but have 6025 cast into them. Do regular performers have 6025 cast into them as well? Has anyone come across this?

 

[jdallen1798]

Hey guys I bought a set of heads used and need 1.90 valves for my combo as I do not have flycut pistons. I'm trying to figure out which kind of heads these are. They say Performer on the front of the head but have 6025 cast into them. Do regular performers have 6025 cast into them as well? Has anyone come across this?

mine are regular perfprmers 190 AND ARE 6037

 

[Jason 302]

RPM versions don't have EGR provisions.

 

[87gtconv]

From Edelbrock web site:

Edelbrock Performer RPM Power Package Components for
302 c.i.d. Ford:

Edelbrock Performer RPM intake manifold..........................#7121
Edelbrock Performer RPM camshaft kit .............................#7122
Edelbrock Performer RPM cylinder heads ...............#6025
Edelbrock Performer Series carburetor (750 cfm, manual choke) ....#1407
Edelbrock Performer-Link Timing Chain Set........................#7820
Edelbrock valve springs .....................#5767
Edelbrock retainers .......................................#9724
Edelbrock valve locks .....................#9611