It's OpenBSD policy to ship kernels that _aren't_ gzip'ed.

src/etc/etc.mac68k/Makefile.inc

@@ -1,20 +1,20 @@
 #
-#	$OpenBSD: Makefile.inc,v 1.1 1997/05/11 02:03:55 gene Exp $
+#	$OpenBSD: Makefile.inc,v 1.2 1997/05/11 02:37:43 gene Exp $
 #	etc.mac68k/Makefile.inc -- mac68k-specific etc Makefile targets
 
 .ifdef DESTDIR
 snap_md: bsd-generic bsd-genericsbc
-	cp ${.CURDIR}/../sys/arch/mac68k/compile/GENERIC/bsd.gz \
-	    ${DESTDIR}/snapshot/bsd-generic.gz
-	cp ${.CURDIR}/../sys/arch/mac68k/compile/GENERICSBC/bsd.gz \
-	    ${DESTDIR}/snapshot/bsd-genericsbc.gz
+	cp ${.CURDIR}/../sys/arch/mac68k/compile/GENERIC/bsd \
+	    ${DESTDIR}/snapshot/bsd-generic
+	cp ${.CURDIR}/../sys/arch/mac68k/compile/GENERICSBC/bsd \
+	    ${DESTDIR}/snapshot/bsd-genericsbc
 bsd-generic:
 	cd ${.CURDIR}/../sys/arch/mac68k/conf && config GENERIC
 	cd ${.CURDIR}/../sys/arch/mac68k/compile/GENERIC && \
-	    make clean && make depend && make && gzip -9 bsd
+	    make clean && make depend && make
 bsd-genericsbc:
 	cd ${.CURDIR}/../sys/arch/mac68k/conf && config GENERICSBC
 	cd ${.CURDIR}/../sys/arch/mac68k/compile/GENERICSBC && \
-	    make clean && make depend && make && gzip -9 bsd
+	    make clean && make depend && make
 
 .endif	# DESTDIR check