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I think i would check your valve springs pressure and how they are installed, i normally run a bit heaver than the cam company sugest and your lift would be less than the carb by 030 with deflection, my 422 makes 750 hp aspirated and 570 ft lbs, horses for courses your small heads for a 422 and...

Hi, how did you go with tracking those 4.100 bore pistons that your mate raced, i might be after some too . thanks Ian

Congrats that car is working well the first half, the fuel pressure dropping in second half is a sure sign you don't have enough fuel pump and when its sorted you pick up 3-4 mph top end

Great thread Greg and those covers look flash mate.

your head port will help it rpm higher and converter slip comes into it as well mate

Thanks mate, i like having a crack and beating some of the big buck stuff on a tight budget lol and tell Kitty thanks too mate

Dave big power big budget goes hand in hand lol

it would be interesting for sure,but i could not afford them,i was going to buy them before my indys 5 years ago lol

sounds a great combo mate

that suxs man but you was leaning on it hard, you will be happy with the big block and make **** load of tq

Are we talking aspirated Dave ? your SB made good power

Thanks man. sorry i have been slack lol

thanks i think so too lol

old r block 4.100 bore 4 inch stroke 422 of the shelf pistons rods and crank old w7 heads that had a nice makeover small 2.100 1.6 my custom cam 270 s with 420 lobe 12.6 comp custom nitrous plate made by me with std elderbrock solenoids and a 1050 shelf holley small 1 7/8 pipes stepped to 2 inch...

going in my street car mate

thanks ,the best thing about it ,it is not a real big dollar thing

Thanks man it should be able to rip a skid

my w7 junka pump fuel street car engine is done 750 aspirated and a easy 1006 hp with a small hit

thanks mike ,there was about 40 hp left on the table but ran out of time we was 6 degrees down on timing for not a crazy over the top deal i am happy

your doing it right mate ,good bottom end go studs top and bottom you may find a cheap gas kit one day and it can go straight on you will have fun in it and that is what it is all about

yes the build is not cheap ,i have done everything ex machine work and it was hard 3 years to get here for me lol i have short hands lol

yes in the old blue 4 door yes she has some more in it, it is still on the dyno ,we will try today for a bit more thanks for the comments guys

its only a old r block i t should do the trick and that is n/a atm and not a full pull the engine will see 250 of gas but should handle more no use being greedy

i got the old girl on the dyno at last ,i still have tuning to do and have not made a full pull yet but very happy so far pump gas 422

left this out lol

you running a slick they will be ok but if its a radial there not good

not sure on that ,anyway time will tell what is weight with driver ? converter may go 3000 comp a little low with the alloys .when are you doing a pass in it ? knuckle

12.9-13.2 with 3,9 s

https://www.summitracing.com/int/parts/str-s5081/overview/year/1970/make/dodge/model/challenger

thanks guys ,they are w7 head .550 offset rocker the whole is where the rocker stands hold down bolts go and its not a poly engine lol