.....Hopper, Why don't you go to campbellenterprises.com
.... Then go to the part that says 'compression calculator' on this same page they have a calculator where you put in your car's wieght & the 1/4 mile time that you want to turn. Then it tells you how much HP you need. Someone one this board will know the conversion from 1/4 mile to 1/8 mile. I don't know it.... Of course this is just a rough estimate, as there are many variables that aren't taken into consideration. But it'll give you somewhere to start. Then figure 1.2 {or so} HP per Cubic Inch for a street motor, normally aspired. Once you know how much HP you need to turn a certain 1/8 mile time then you can go from there..... Did you know you can have a 377 with a stock 350 block {4" bore} and a 400 crank {3.75'}??? I say this cuz 400 blocks are getting harder to find & they run hotter...... But Performance Automotive Warehouse {PAW} in Chatsworth {used to have other locations} @ 818-678-3000 has parts for this. On page 63 of the catalog that I have is a kit for $1900 with a 400 block & a 350 chrank {along with the rods, pistons, rings, bearings, cam, timing chain set, etc, & it's balanced}. This one is bored .060 over which is 383 cu. in's but I got a kit from them once and they do substitutions, no problem..... Plus they have a service that resleaves blocks for cheap, but ONLY if you buy a kit from them {if you have to to get your .030 over 377}. Also they have seperate parts for what your looking to do..... Do you already have a good 400 block??? If so, then great. If not, then when you do find one you'll have to have it checked out, which costs money. If it'
s a good block great, but if not then you've got to go find another one & have it checked {did I mention more money???}. If your block gets ruined a couple of years down the road & you want to use the same engine internals that your using now? And 400 blocks are even harder to find then? Well then it's $1800 bucks on up for a 4.155 bore Dart, Motown or GM block.... Also if you go with a .030 400 & you want to rebuild it down the road & go .060 over there is a terrible selection of pistons for a .060 over 400 {a 413}. How do I know a lot of this??? Because I have a 400 that's bored .060 {a 413} sitting out in my garage. The block is ruined but the internals are good. My options are; 1} I can purchase an $1850 Dart block. 2} I can comb through junk yards looking for a block & then pay money to have it checked {if I can find one} & pray that it's a good one {they are between 25 & 35 years old}. 3) I found a couple on Ebay a) $750 & it already has a crank, rods & pistons. I already have those parts. I just need a block b) GREAT I found another one, it's only $300 {ut oh, the shipping to my house is $360!!!. That's $660!!.. {plus is it REALLY a good block???} What am I going to do if it's not??? Sent it back for another $360??? OR # 4} I can have a machine shop resleeve my old 400 block for $1200 bucks.... Well I can purchase a BRAND NEW 350 from the GM Dealer for $600 bucks!!! But NO, I wanted to be different.... Yeah, I just had to have a .060 400. Wouldn't listen to anyone....
Good Luck Hope this helps ya..... bill

Oh, if ya want a buy a 400 block that needs to be resleeved, let me know......