Race blocks

acpat said
low deck will handle that much with a girdle. the intake can gain clearance by dropping K frame 1/2 with spacers. problem is more with keeping 727 together at 7-8 hundred hp level. There are 4 different 400 block casting numbers. Large numbered 230 block cast in early 71 (the best). small 230 block cast in later 71 which is not as good but still good. 530 and 630 I believe are the later two. The low deck 400 will do anything a 440 can do and do it better. This is due to shorter cylinder walls and less flex. Better fit in A body etc.

Big Block Mopar Engine Performance 383 413 426 440 | eBay

this book is wealth of knowledge on 400 strokers. I would not buy a briggs and stratton from Indy or anything else for that matter. Their track record has been proven over and over. They do not and will not stand behind anything they build or sell.

The casting number on my 400 block is 3614230. I assume it's a late 71 block. I pulled it out of a B body 4 or 5 years ago. I think it was an early 70s Newport. There is a lot of debate about weather or not a factory block with a girdle rely can handle big power. The question is for how long or how many runs can it handle it. As far as dealing with INDY, I hear ya' I've talked to them on the phone and yes they are absolute jerks. What I've heard is if you want INDY parts, DON'T buy from INDY, buy from an INDY dealer. The dealers sort through the garbage and send the bad parts back. Little guys who buy parts get screwed when they have a problem with INDY parts.