help!!! B16a block. GSR head????

I have a 89' crx si. It has a b16a bone stock. I was wondering if a obd1 gsr head will directly bolt on to the block? The reason I am asking is because I am getting a jrsc from a 95 gsr for very cheap. What would the compression be after instalation? Will it have any fitment problems? How good will this combination work? Some insights please.

yes it will fit, the Dome CC is smaller in the GSR than the B16a, and you need a GSR intake manifold ( or JRSC) to use.

so you might gain .5 of compression in swaping in head.

What gasket would I use? And would I have to use a gsr waterpump and timing belt?

are you doing this just to have low compression. why not do a gsr block with b16 head and keep the gsr pistons in it. the compression of that is like 9.6:1

Because the jrsc will not bolt up to a b16 head.

any Vtec water pump (b16a, b18c (same part#))
Timing belt you need a B16a belt
head gasket, is a B16a or GSR one, they are the same.

Thanks for all the help. I greatly appreciate it.