My 360 v8 has 2 blown pistons and gouged the cylinder walls its already bored at .30 over how much further with out going to far can I go

 

360 blocks are dime a dozen , time to find a new one or better yet a 390

 

Mike, What is the difference between a 360 and a 390 block?




John

 

I plan on changing the guts to make it a 390 i just really want to have the original motor in the truck but if you know anyone who is selling one I'll be glad to talk to them bout it

 

The blocks are the same the only difference is the guts of the engines you can change a 360 to a 390 with just a few internal parts

 

what he said ,
but he needs a block , so better to find a whole 390 and have all the pieces

 

I have a 1970 F100. The engine was a 70 360, but with a 73 block. The block easily bored to .060, and I changed the crank, rods and pistons to 390. It runs perfect with lots of power and doesn't get hot.

 

I think .060 over is the highest most people will take the FE block because it is prone to core shift. You can always overbore and sleeve it if its only the two cyls that are messed up. Right now you do have a unique opportunity to go big tho, the 360 block can be taken up to something like 445cubes if stroked, and there is a place out there that sells the kits for like $2100, cast steel crank, hbeams and forged pistons. Grab a new block and go crazy! Good luck!