Originally Posted by
scoooby slayer
that was on a 200 block, the point im making is standard headbolts are fine ime.
ive had a 1mm overbore 205 block crack up the bore but it did lots of miles and abuse at 350 hp first.
I wouldn't be worried about running a 205 at 500 hp on standard headbolts as long as the block isn't overbored and isn't rotted to badly from inside out in the water jackets.
The block is as good as new only done running in miles. Was bought new from ford some time ago and sat under his stairs. The previous owner pay 1k for it. It did come with new pistons and low miles con rods and crank.