This gives you some place to start,
http://www.gnttype.org/techarea/pictureguides/blocks/blockguide.html
83 and 84 are supose to be the best.
check the casting # to be sure.
good luck
Chris
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Original owner
PTE 44,THDP,868's,port matched heads/intake,ported stock intercooler,14in K&N,every thing else stock!!
Best 1/8 7.87 @87.4 mph with Pep Boy Tires and 2nd slipping!!!!
Eng and trany apart...will be back soon!!