Im really wanting to build a 427 but im not sure what block to start with that will be safe?

 

I recommend using an LS7 block for your 427. This gives you the opportunity to run the LS7 heads, and people have been making some pretty decent power with those motors.

 

Whats a ls7 block cost rufly

 

The thinkg is i have a 6.0 block right now. Im just not sure what to use

 

Seems like the stroked 6.0s love to chew up pistons due to the rod angle. How is that avoided?

 

I wish i new. I havent started on it yet im still trying to decied if 427 is pushing to far with this block

 

We sell brand new LS7 blocks for $2724.99. You can get sleeves put into iron blocks but it is very expensive. I would think it would cheaper to just buy an aluminum block and then sell the iron one you have.

I have not seen stroked iron blocks chew up pistons unless there is an oddball setup in the motor. We run a lot of 4.01" and 4.030" with a 6.125" rod and have had next to no issues with that kind of problem.

 

What r the advantages to alum block compared to iron. Other then how heavy it is

 

the ls7 is 4.125" bore. other than that and the weight savings, that is about it in reality. without getting into to much details. there are plenty of well built 408 iron block/ cathederal head motors that put out great power and last . i have one of tsp's 408 shortblocks and it has been a great mill. i guess it just depends on what you want to do and how much your budget is.

 

What do you want to do with it? If you want to build a performance engine I would stay away from the LS7 block unless you have it resleeved. The sleeves are weak and will crack.

 

Im gona drive it on the street an race an maybe go to the track 2 times a year. Just a play car

 

Recently, I had decided to do a 427 build, from a 6.0L LS2 (aluminum) block. I chose the LS2 because of the price (got a sweet deal). I have opted to have ERL do a 4.125 dry-sleeve install for me. Even after the re-sleeve and all other associated machine work, I will have LESS into the LS2 engine block, than what it would cost for a NEW LS7 block. Not to mention, mine will be way stronger, and accept a few more bores than a LS7 EVER could take. Also, it will look just like a regular LS2.