maybe this will be of interest

http://www.ws6transam.org/ported.html

http://www.goingfaster.com/spo/325_h...chevrolet.html

http://www.newcovenant.com/firebird/stockengine.htm

http://www.carcraft.com/howto/854/

http://www.hioutput.com/tech/400hp/400hp.html


the 305 and 307 sbc engines are far from ideal starting points for a performance engine build-up.
given a choice a 383 or 396 stroker combo built on a 350 block is a FAR BETTER starting point than a crummy 305,or 307 sbc with its limitations, but theres dozens of guys stuck with those 305s so I figured Id give them some usefull info!

while its not reasonable to start at a disadvantage then try to overcome it, before building an engine , you need to realize that many guys feel they must work with what they currently have,personally Ive always found it advantagious to build a second PERFORMANCE engine in the garage and swap it in, rather than constantly doing minor mods to an original street engine!
the advantages are many! but the main one is that you can drive the car within the weekend should the performance engine fail, bye swapping in the standard engine
if you look around carefully youll find that building a 350-396 sbc over time in your garage ,taking the time to do it correctly and saving and learning BEFORE spending money on combos that waste money is the smarter way to go!


we need to know your REALISTIC hp goals and what the cars gearing,transmission and emission requirements are and all the other info you can give,what YOUR mechanical skills are,but generally headers, a free flow exhaust, increased compression,a cam swap and better flowing heads will give good results, look over these sights for ideas

http://www.ryanscarpage.50megs.com/combos1.html

http://www.73-87.com/chp/chp.htm

http://chevyhiperformance.com/techar...298/index.html

you really should get these books and read them before going any further, it will help a good deal,AND SAVE YOU YEARS AND THOUSANDS OF WASTED DOLLARS, while only the basic info is presented it still makes for a good knowledge base, and referance :grin:

IF YOU SMART ENOUGHT TOO DO YOURSELF A HUGE FAVOR FIRST and
buy these books, [color:"red"] it will be the best money you ever spent, read them, and you will be miles ahead of the average guy.[/color] youll save thousands of dollars and thousands of hours once youve got a good basic understanding of what your trying to do! IF YOUR ON A VERY LIMITED BUDGET START WITH BOOKS 3,4,AND 5, ONLY BUT YOU NEED AT LEAST THOSE BEFORE DOING ANYTHING ELSE
http://www.amazon.com/exec/obidos/tg...=UTF8&v=glance


http://www.amazon.com/exec/obidos/tg...glance&s=books


HOW TO BUILD THE SMALL BLOCK CHEVEROLET by LARRY ATHERTON&LARRY SCHREIB
.
HOW TO BUILD MAX PERFORMANCE CHEVY SMALL BLOCKS ON A BUDGET by DAVID VIZARD

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JOHN LINGENFELTER on modifying small-block chevy engines


how to build & modify CHEVROLET small-block V-8 CAMSHAFTS & VALVTRAINS BY DAVID VIZARD

SMOKEY YUNICK,S POWER SECRETS


SMALL BLOCK CHEVY ENGINE BUILDUPS