For all the quality issues there are with Indy and their historically bad customer service, unless you plan to go for even more HP in the future, I would lean towards the Trick Flows and a little porting work over the Indy's. Trick Flow was awesome and actually let me swap my 240's for 270's for no charge when they first came out (and even told me to use the 240's until they could get me my 270's). They made a fan out of me. Just my personal choice.
I currently have the 270's which were ported by Larry Smith and they flow
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[email protected]. That is plenty of flow to get to your 700 hp and more. The other thing is, to go much over 700-750 with a stock block isn't too realistic for long term use if you are going to be racing it a lot.
If it is going to be more of a bad *** street car that you race 20% of the time, you may just want to go with a .600'ish hydraulic roller cam, make 600-650hp with a less exotic, lower maintenance top end and just throw a 100 shot of nitrous on it for that 20% track time.
My 526" has a .715 solid roller in it and has been streetable with a well tuned Thumper carb and very well coordinated package of everything else (GV Overdrive, custom Ultimate convertor, etc.) , but it was a lot of money required to make it bulletproof (Custom T&D rockers, 7/16" tapered pushrods, BRC cap and girdle system, etc.) and it still requires a little restraint and some definite finesse to drive. If parts availability weren't so stupid expensive and slow these days, I would probably step my build back a little but I still want to drive it to all my shows within 500 miles, and run that 9.99 number while being able to say I do it N.A. The only way that is happening is with the current build.
