12.5-1 trw forged pistons

BadBrian · Post by **BadBrian** » Sat Feb 12, 2005 8:48 am

I have a chance to buy a set ot new trw 12.5-1 forged high compression pistons for a very good price. The specs are 4" standard bore block w/ 3.550 stroke and 5.7 rod it says they work with standard 350 crank. I need to know if they will fit in my 1976 - 350 4 bolt main block casting #3970010 I don't want to buy them only to find out I need to do alot of work to my block to make them fit. Thanks Brian

bill jones · Post by **bill jones** » Sat Feb 12, 2005 12:23 pm

-if the pistons are standard yoiu lose because any blocy that's been around that long will need to be bored just to clean up the cylinder wall wear.
-The 3.550 stroke means that you'd need some special stroker crank or you have the top of the pistons down in the hole an extra 35 thou or so.