Is there any reason a 86 head wouldn't fit on a 79 block for a 258 jeep engine? I know the bolts are bigger for the 79 head but can I bore the holes on the 86 head by 30 mils to make it fit?
I've got an early 87 head, which I think is identical to your 86, on a 75 block and have had no problems. I know the block ID on my original motor showed it to be manufactured in 86.
86 used 7/16 head bolts,, block is tapped to 7/16in. bolt, previous years used a 1/2in. u can is an 86 block and previous year head w/ spaceers in the head or have the 86 head machined to 1/2in holes and use on prev. year block.
good luck!
