4A-GE engine mix - question

[Maren]

Hey,

my name is Maren and I am new to this forum. Actually, my car is an MR2 MK1 but as it shares most engine parts with the AE and the AE crowd is much bigger than the MR2's, I decided to register here

However, I am troubling with the build-up of my new engine and could need some help from people with more experience. I tried to search already but didn't find an answer.

My car had an MAP-based Bluetop engine which rapidly wore due to a very stupid mistake (that's what the oil is needed for... )

I found an replacement which sounded good: rebuild Bluetop from an AE based on a 7-rip block, about 20.000km old. Unfortunately, it has been build with 18mm piston pins (and one stuck), some residues on one piston skirt which looks like metal, partly shiny polished cylinders, blue shaded crank, worn conrod bearings, etc.
So this one is crap, too.

Now I tried to find the best option to get an engine back into my car. I was running Megasquirt and Catcams before and currently I am working on one of the Bluetop heads (polishing according to the TRD bible) while a friend is making a manifold to run motobike throttles. So performance is an issue.

I have several options now, but the one I like most is buying a new shortblock for a smallport engine and combine it with the Bluetop head.

I could also rebuild the 7-rib block with smallport conrods and pistons to get the higher CR but I think it won't be much cheaper and I won't have the oil squirters then

Does somebody know if this fits together, SP block and BP head? Will I get the higher smallport's CR then or is it same as before due to the BP head?

Hope somebody can help!

Maren